(10 ILCS 91/10.31)
    Sec. 10.31. Representative District No. 31. Representative District No. 31 is comprised of:
 
District: 31
Cook County
    Tract: 661000
        Blockgroup: 2
            Block 2001
            Block 2002
            Block 2017
            Block 2018
            Block 2021
            Block 2022
    Tract: 671800
        Blockgroup: 1
            Block 1000
            Block 1003
            Block 1004
            Block 1005
            Block 1008
            Block 1009
            Block 1010
            Block 1011
            Block 1012
            Block 1013
            Block 1014
            Block 1015
            Block 1016
            Block 1017
            Block 1018
            Block 1019
            Block 1020
            Block 1021
            Block 1022
            Block 1023
            Block 1024
            Block 1025
            Block 1026
            Block 1027
            Block 1028
            Block 1029
            Block 1030
            Block 1031
            Block 1032
            Block 1033
            Block 1034
    Tract: 671900
        Blockgroup: 1
            Block 1014
            Block 1015
            Block 1016
            Block 1017
            Block 1018
            Block 1019
            Block 1020
            Block 1021
            Block 1022
            Block 1023
            Block 1024
            Block 1025
            Block 1026
            Block 1027
            Block 1028
            Block 1029
            Block 1030
            Block 1031
            Block 1032
            Block 1033
            Block 1034
            Block 1035
            Block 1036
            Block 1037
            Block 1038
            Block 1039
            Block 1040
            Block 1041
            Block 1042
    Tract: 672000
        Blockgroup: 1
            Block 1007
            Block 1008
            Block 1009
            Block 1010
            Block 1011
            Block 1012
            Block 1013
            Block 1014
            Block 1017
            Block 1018
            Block 1019
            Block 1020
        Blockgroup: 2
            Block 2009
            Block 2010
            Block 2011
            Block 2012
            Block 2013
            Block 2014
            Block 2015
            Block 2016
            Block 2017
            Block 2018
            Block 2019
        Blockgroup: 3
            Block 3009
            Block 3010
            Block 3011
            Block 3012
            Block 3013
            Block 3014
            Block 3015
            Block 3016
            Block 3017
            Block 3018
            Block 3019
            Block 3020
        Blockgroup: 4
            Block 4005
            Block 4006
            Block 4007
            Block 4008
            Block 4009
            Block 4010
            Block 4011
            Block 4012
            Block 4013
    Tract: 681300
        Blockgroup: 1
        Blockgroup: 2
            Block 2015
            Block 2016
            Block 2017
        Blockgroup: 3
    Tract: 681400
        Blockgroup: 1
            Block 1002
            Block 1003
            Block 1004
            Block 1005
            Block 1007
            Block 1008
            Block 1009
            Block 1010
            Block 1011
            Block 1012
            Block 1013
            Block 1014
        Blockgroup: 2
        Blockgroup: 3
        Blockgroup: 4
    Tract: 691100
        Blockgroup: 2
            Block 2003
            Block 2004
            Block 2005
            Block 2006
            Block 2007
            Block 2008
            Block 2009
        Blockgroup: 3
        Blockgroup: 4
            Block 4010
            Block 4014
            Block 4015
            Block 4016
            Block 4017
            Block 4018
            Block 4019
    Tract: 691200
        Blockgroup: 1
        Blockgroup: 2
            Block 2007
            Block 2008
            Block 2009
            Block 2010
            Block 2011
            Block 2012
            Block 2015
            Block 2016
            Block 2017
            Block 2022
            Block 2023
        Blockgroup: 3
    Tract: 700100
        Blockgroup: 2
            Block 2000
            Block 2001
            Block 2002
            Block 2003
            Block 2004
            Block 2005
            Block 2006
            Block 2007
            Block 2008
            Block 2009
            Block 2010
            Block 2011
            Block 2012
            Block 2013
            Block 2014
            Block 2016
            Block 2018
            Block 2053
            Block 2054
            Block 2055
            Block 2056
    Tract: 700302
        Blockgroup: 4
            Block 4012
            Block 4013
            Block 4014
            Block 4018
            Block 4019
            Block 4020
            Block 4021
            Block 4022
            Block 4023
            Block 4024
            Block 4025
            Block 4026
            Block 4027
            Block 4028
            Block 4037
            Block 4038
            Block 4039
            Block 4040
            Block 4041
            Block 4042
            Block 4043
            Block 4044
            Block 4045
            Block 4054
            Block 4055
            Block 4056
            Block 4057
            Block 4058
    Tract: 700401
        Blockgroup: 1
            Block 1056
            Block 1057
            Block 1058
            Block 1059
            Block 1060
            Block 1063
            Block 1064
            Block 1065
            Block 1066
            Block 1067
        Blockgroup: 3
            Block 3022
            Block 3023
            Block 3024
            Block 3025
            Block 3026
            Block 3027
            Block 3028
            Block 3029
            Block 3038
        Blockgroup: 4
            Block 4000
            Block 4001
            Block 4009
            Block 4010
            Block 4011
            Block 4012
            Block 4013
            Block 4014
            Block 4015
            Block 4016
            Block 4017
            Block 4018
            Block 4019
            Block 4020
            Block 4021
            Block 4022
            Block 4023
    Tract: 700402
        Blockgroup: 1
            Block 1000
            Block 1005
            Block 1006
            Block 1007
            Block 1008
            Block 1009
            Block 1012
            Block 1013
            Block 1014
            Block 1015
            Block 1016
            Block 1017
            Block 1018
            Block 1019
            Block 1020
            Block 1021
            Block 1022
            Block 1023
            Block 1024
            Block 1025
            Block 1026
            Block 1027
            Block 1028
            Block 1029
            Block 1030
            Block 1031
            Block 1032
        Blockgroup: 2
        Blockgroup: 3
    Tract: 700501
        Blockgroup: 1
        Blockgroup: 2
        Blockgroup: 3
        Blockgroup: 4
        Blockgroup: 5
        Blockgroup: 6
            Block 6000
            Block 6001
            Block 6002
            Block 6003
            Block 6004
            Block 6005
            Block 6006
            Block 6007
            Block 6008
            Block 6009
            Block 6010
            Block 6011
            Block 6012
            Block 6013
            Block 6014
            Block 6015
            Block 6016
            Block 6017
            Block 6018
            Block 6019
            Block 6020
            Block 6021
            Block 6022
            Block 6023
            Block 6024
            Block 6025
            Block 6026
            Block 6027
            Block 6028
            Block 6029
            Block 6030
            Block 6031
            Block 6032
            Block 6033
    Tract: 700502
        Blockgroup: 1
            Block 1011
            Block 1012
            Block 1013
            Block 1014
            Block 1015
            Block 1016
            Block 1017
            Block 1018
            Block 1019
            Block 1021
            Block 1022
            Block 1023
            Block 1024
            Block 1025
        Blockgroup: 2
            Block 2000
            Block 2001
            Block 2002
            Block 2003
            Block 2004
            Block 2005
            Block 2006
            Block 2007
            Block 2008
            Block 2009
            Block 2010
            Block 2011
            Block 2012
            Block 2013
            Block 2014
            Block 2015
            Block 2016
            Block 2020
    Tract: 710100
    Tract: 710200
    Tract: 710300
    Tract: 710400
    Tract: 710500
    Tract: 710600
    Tract: 710700
    Tract: 710800
    Tract: 710900
        Blockgroup: 1
        Blockgroup: 2
            Block 2000
            Block 2001
            Block 2002
            Block 2003
            Block 2004
            Block 2005
            Block 2006
            Block 2007
            Block 2009
            Block 2010
            Block 2011
            Block 2012
            Block 2013
            Block 2014
            Block 2016
            Block 2017
            Block 2018
            Block 2019
            Block 2020
            Block 2024
            Block 2025
            Block 2026
            Block 2027
            Block 2042
            Block 2043
    Tract: 711000
        Blockgroup: 1
            Block 1002
            Block 1003
            Block 1004
            Block 1005
            Block 1006
            Block 1007
            Block 1008
            Block 1009
        Blockgroup: 2
            Block 2000
            Block 2001
            Block 2002
            Block 2003
            Block 2004
            Block 2005
            Block 2006
            Block 2009
            Block 2010
    Tract: 711100
        Blockgroup: 1
            Block 1000
            Block 1001
            Block 1002
            Block 1003
            Block 1004
            Block 1005
        Blockgroup: 3
            Block 3000
            Block 3001
            Block 3002
            Block 3003
            Block 3004
            Block 3005
            Block 3009
            Block 3011
    Tract: 711200
        Blockgroup: 1
            Block 1000
            Block 1001
            Block 1006
            Block 1007
            Block 1008
            Block 1009
            Block 1010
            Block 1011
            Block 1015
        Blockgroup: 4
            Block 4000
            Block 4001
            Block 4002
            Block 4003
            Block 4004
            Block 4005
            Block 4006
            Block 4007
            Block 4008
            Block 4009
            Block 4010
            Block 4011
            Block 4012
            Block 4015
            Block 4016
            Block 4019
            Block 4020
    Tract: 820101
        Blockgroup: 1
            Block 1015
            Block 1016
            Block 1020
        Blockgroup: 6
        Blockgroup: 7
    Tract: 820103
        Blockgroup: 3
            Block 3030
            Block 3035
            Block 3036
            Block 3037
        Blockgroup: 4
            Block 4030
            Block 4031
    Tract: 820104
        Blockgroup: 2
            Block 2000
            Block 2001
            Block 2002
            Block 2003
            Block 2004
            Block 2006
            Block 2007
            Block 2008
            Block 2009
            Block 2010
            Block 2011
            Block 2012
            Block 2013
            Block 2014
            Block 2015
            Block 2016
            Block 2017
            Block 2018
            Block 2019
            Block 2020
            Block 2021
            Block 2022
            Block 2023
            Block 2024
            Block 2025
        Blockgroup: 3
            Block 3008
            Block 3009
            Block 3010
            Block 3011
            Block 3012
            Block 3013
            Block 3014
            Block 3015
            Block 3016
            Block 3017
        Blockgroup: 4
    Tract: 820201
        Blockgroup: 1
            Block 1000
            Block 1001
            Block 1002
            Block 1003
            Block 1004
            Block 1005
            Block 1006
            Block 1007
            Block 1008
            Block 1009
            Block 1010
            Block 1011
            Block 1012
            Block 1013
            Block 1014
            Block 1015
            Block 1016
            Block 1017
            Block 1018
            Block 1019
            Block 1020
            Block 1021
            Block 1022
            Block 1023
            Block 1024
            Block 1025
            Block 1026
            Block 1027
            Block 1028
            Block 1041
            Block 1042
            Block 1043
            Block 1044
            Block 1045
            Block 1047
            Block 1048
            Block 1049
            Block 1050
            Block 1051
            Block 1052
            Block 1053
            Block 1054
            Block 1055
            Block 1056
            Block 1057
            Block 1058
            Block 1059
            Block 1060
            Block 1061
        Blockgroup: 2
            Block 2000
            Block 2001
            Block 2002
            Block 2003
            Block 2004
            Block 2008
            Block 2009
            Block 2010
            Block 2013
            Block 2014
            Block 2043
            Block 2044
            Block 2045
            Block 2046
            Block 2047
            Block 2048
            Block 2049
            Block 2053
            Block 2054
        Blockgroup: 3
            Block 3000
            Block 3001
            Block 3002
            Block 3003
            Block 3004
            Block 3005
            Block 3006
            Block 3009
            Block 3010
            Block 3022
            Block 3024
            Block 3025
            Block 3029
            Block 3030
            Block 3031
            Block 3037
            Block 3038
        Blockgroup: 4
            Block 4040
    Tract: 820202
        Blockgroup: 1
            Block 1136
            Block 1137
            Block 1138
            Block 1152
            Block 1155
            Block 1160
            Block 1161
            Block 1162
            Block 1163
            Block 1164
            Block 1165
            Block 1166
            Block 1167
            Block 1168
            Block 1169
            Block 1170
            Block 1171
            Block 1172
            Block 1173
            Block 1174
            Block 1175
            Block 1176
            Block 1177
            Block 1178
            Block 1179
            Block 1180
            Block 1181
            Block 1182
            Block 1183
            Block 1184
            Block 1185
            Block 1186
            Block 1187
            Block 1204
            Block 1206
            Block 1207
            Block 1209
            Block 1211
            Block 1213
            Block 1215
            Block 1217
            Block 1220
            Block 1238
            Block 1239
            Block 1240
            Block 1241
            Block 1242
            Block 1243
            Block 1244
            Block 1245
            Block 1246
            Block 1247
            Block 1248
            Block 1249
            Block 1255
        Blockgroup: 2
        Blockgroup: 3
    Tract: 820603
        Blockgroup: 1
            Block 1000
            Block 1001
            Block 1002
            Block 1003
            Block 1004
            Block 1017
            Block 1018
            Block 1019
            Block 1020
            Block 1021
            Block 1022
            Block 1023
            Block 1024
            Block 1025
            Block 1026
            Block 1029
            Block 1030
            Block 1031
            Block 1032
            Block 1033
            Block 1034
            Block 1035
            Block 1036
            Block 1037
            Block 1038
            Block 1039
            Block 1040
            Block 1041
            Block 1042
            Block 1043
        Blockgroup: 2
            Block 2025
    Tract: 820606
        Blockgroup: 1
            Block 1000
            Block 1001
            Block 1002
            Block 1003
            Block 1004
            Block 1005
            Block 1006
            Block 1007
            Block 1008
            Block 1009
            Block 1010
            Block 1011
            Block 1012
            Block 1013
            Block 1014
            Block 1015
            Block 1016
            Block 1017
            Block 1018
            Block 1019
            Block 1020
            Block 1021
            Block 1022
            Block 1023
            Block 1024
            Block 1025
            Block 1026
            Block 1027
            Block 1028
            Block 1029
            Block 1030
            Block 1031
            Block 1032
            Block 1033
            Block 1034
            Block 1035
            Block 1036
            Block 1037
            Block 1038
            Block 1039
        Blockgroup: 2
            Block 2008
            Block 2009
            Block 2010
            Block 2011
            Block 2012
            Block 2013
            Block 2014
            Block 2015
            Block 2016
            Block 2017
            Block 2019
            Block 2023
            Block 2024
            Block 2036
            Block 2037
            Block 2038
            Block 2039
            Block 2040
            Block 2041
            Block 2042
            Block 2043
            Block 2044
    Tract: 821101
        Blockgroup: 3
            Block 3021
    Tract: 821600
        Blockgroup: 4
            Block 4002
    Tract: 822000
    Tract: 822101
        Blockgroup: 1
        Blockgroup: 2
            Block 2000
            Block 2001
            Block 2002
            Block 2003
            Block 2004
            Block 2005
            Block 2006
            Block 2007
            Block 2008
            Block 2009
            Block 2012
            Block 2013
            Block 2014
            Block 2015
            Block 2023
    Tract: 822102
        Blockgroup: 2
            Block 2007
            Block 2008
            Block 2009
            Block 2010
            Block 2011
            Block 2012
            Block 2013
            Block 2014
            Block 2028
            Block 2029
    Tract: 822200
        Blockgroup: 1
        Blockgroup: 2
        Blockgroup: 3
            Block 3000
            Block 3001
            Block 3002
            Block 3003
            Block 3004
            Block 3005
            Block 3006
            Block 3007
            Block 3008
            Block 3009
            Block 3010
            Block 3011
    Tract: 822301
        Blockgroup: 1
            Block 1001
            Block 1002
            Block 1003
            Block 1004
            Block 1005
            Block 1006
            Block 1007
            Block 1008
            Block 1009
            Block 1010
            Block 1011
            Block 1012
            Block 1013
            Block 1014
            Block 1015
            Block 1016
            Block 1017
            Block 1018
            Block 1019
            Block 1020
            Block 1021
            Block 1022
            Block 1023
            Block 1024
        Blockgroup: 2
        Blockgroup: 3
        Blockgroup: 4
    Tract: 822302
        Blockgroup: 1
        Blockgroup: 2
            Block 2001
            Block 2002
            Block 2003
            Block 2005
            Block 2006
            Block 2007
            Block 2016
        Blockgroup: 3
            Block 3000
            Block 3001
            Block 3002
            Block 3003
            Block 3004
            Block 3005
            Block 3006
            Block 3007
            Block 3008
            Block 3009
            Block 3010
            Block 3011
            Block 3012
            Block 3013
            Block 3014
            Block 3015
            Block 3016
            Block 3017
            Block 3018
            Block 3019
            Block 3020
            Block 3021
            Block 3022
            Block 3025
            Block 3026
            Block 3027
            Block 3028
            Block 3029
            Block 3030
            Block 3031
    Tract: 822400
        Blockgroup: 1
            Block 1012
            Block 1013
            Block 1016
            Block 1017
            Block 1018
        Blockgroup: 2
        Blockgroup: 3
        Blockgroup: 4
    Tract: 822900
        Blockgroup: 1
            Block 1023
            Block 1032
    Tract: 823001
        Blockgroup: 1
            Block 1000
            Block 1001
            Block 1002
            Block 1003
            Block 1004
            Block 1005
            Block 1006
            Block 1007
            Block 1008
            Block 1009
            Block 1010
            Block 1011
            Block 1012
            Block 1013
            Block 1014
            Block 1015
            Block 1016
            Block 1017
            Block 1018
            Block 1019
            Block 1020
            Block 1021
            Block 1022
            Block 1023
            Block 1027
            Block 1028
            Block 1029
            Block 1030
            Block 1032
            Block 1041
            Block 1042
            Block 1043
            Block 1044
            Block 1045
            Block 1046
            Block 1047
        Blockgroup: 5
            Block 5000
            Block 5001
            Block 5002
            Block 5003
            Block 5004
            Block 5005
            Block 5006
            Block 5007
            Block 5008
            Block 5009
            Block 5010
            Block 5011
            Block 5012
            Block 5013
            Block 5014
            Block 5015
            Block 5016
            Block 5017
            Block 5018
            Block 5020
            Block 5027
            Block 5028
            Block 5029
    Tract: 823702
        Blockgroup: 1
        Blockgroup: 2
            Block 2000
            Block 2001
            Block 2002
            Block 2003
            Block 2004
            Block 2005
            Block 2006
            Block 2007
            Block 2008
            Block 2009
            Block 2010
            Block 2011
            Block 2012
            Block 2013
            Block 2014
            Block 2015
            Block 2016
            Block 2017
            Block 2022
        Blockgroup: 3
            Block 3000
            Block 3001
            Block 3002
            Block 3003
            Block 3004
            Block 3005
            Block 3006
            Block 3007
            Block 3008
            Block 3009
            Block 3010
            Block 3011
            Block 3012
            Block 3013
            Block 3014
            Block 3015
            Block 3016
        Blockgroup: 4
            Block 4000
            Block 4001
            Block 4004
            Block 4008
            Block 4009
            Block 4010
            Block 4011
            Block 4012
            Block 4013
            Block 4014
            Block 4015
            Block 4016
            Block 4017
    Tract: 823703
        Blockgroup: 2
    Tract: 823704
        Blockgroup: 2
        Blockgroup: 3
    Tract: 823801
        Blockgroup: 3
            Block 3000
            Block 3001
            Block 3002
            Block 3003
            Block 3004
            Block 3005
            Block 3006
            Block 3007
            Block 3008
            Block 3009
            Block 3010
            Block 3012
            Block 3027
            Block 3028
            Block 3029
            Block 3030
            Block 3031
            Block 3032
            Block 3033
            Block 3042
    Tract: 842400
        Blockgroup: 2
            Block 2000
            Block 2001
            Block 2002
            Block 2003
            Block 2007
            Block 2008
            Block 2009
            Block 2010
            Block 2011
            Block 2012
            Block 2013
            Block 2014
            Block 2015
            Block 2016
            Block 2017
            Block 2018
            Block 2019
            Block 2020
            Block 2021
            Block 2022
            Block 2026
            Block 2027
            Block 2028
            Block 2029
        Blockgroup: 3
(Source: P.A. 97-6, eff. 6-3-11.)