(10 ILCS 91/10.4)
    Sec. 10.4. Representative District No. 4. Representative District No. 4 is comprised of:
 
District: 4
Cook County
    Tract: 200401
        Blockgroup: 1
            Block 1009
            Block 1010
            Block 1011
            Block 1012
            Block 1013
        Blockgroup: 2
            Block 2017
            Block 2018
            Block 2019
            Block 2020
            Block 2021
            Block 2022
            Block 2023
            Block 2024
            Block 2025
    Tract: 200402
        Blockgroup: 1
        Blockgroup: 2
    Tract: 220701
        Blockgroup: 1
            Block 1004
            Block 1005
            Block 1006
            Block 1007
            Block 1008
            Block 1009
        Blockgroup: 2
            Block 2004
            Block 2005
            Block 2006
            Block 2007
            Block 2008
            Block 2009
        Blockgroup: 3
            Block 3012
            Block 3013
            Block 3014
    Tract: 220901
        Blockgroup: 1
        Blockgroup: 2
            Block 2000
            Block 2001
            Block 2002
            Block 2003
            Block 2004
            Block 2005
            Block 2006
            Block 2007
        Blockgroup: 3
    Tract: 220902
        Blockgroup: 1
            Block 1000
            Block 1004
            Block 1005
            Block 1016
            Block 1017
            Block 1018
        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 2012
            Block 2017
            Block 2018
            Block 2019
            Block 2020
            Block 2021
            Block 2022
    Tract: 222500
    Tract: 222600
    Tract: 222700
        Blockgroup: 1
            Block 1000
            Block 1001
            Block 1003
            Block 1004
            Block 1005
            Block 1009
            Block 1010
            Block 1011
            Block 1012
            Block 1013
    Tract: 222800
        Blockgroup: 1
            Block 1005
            Block 1009
            Block 1010
            Block 1013
            Block 1014
    Tract: 222900
    Tract: 230100
    Tract: 230200
    Tract: 230300
    Tract: 230400
    Tract: 230500
        Blockgroup: 1
        Blockgroup: 2
            Block 2000
            Block 2001
            Block 2002
            Block 2003
            Block 2004
            Block 2005
            Block 2006
            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
            Block 2026
            Block 2027
    Tract: 230600
        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
        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 3018
        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 4013
            Block 4014
            Block 4015
        Blockgroup: 6
            Block 6000
            Block 6001
            Block 6002
            Block 6003
            Block 6004
            Block 6010
            Block 6011
            Block 6012
            Block 6013
            Block 6014
            Block 6015
            Block 6016
            Block 6017
            Block 6018
    Tract: 230700
    Tract: 230800
    Tract: 230900
    Tract: 231100
        Blockgroup: 1
            Block 1000
    Tract: 240600
    Tract: 240700
    Tract: 240800
    Tract: 240900
    Tract: 241000
    Tract: 241100
    Tract: 241200
    Tract: 241300
        Blockgroup: 1
            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
    Tract: 241400
        Blockgroup: 1
            Block 1010
            Block 1011
            Block 1012
            Block 1015
        Blockgroup: 2
        Blockgroup: 3
        Blockgroup: 4
    Tract: 241600
        Blockgroup: 2
            Block 2007
    Tract: 242000
        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
        Blockgroup: 2
        Blockgroup: 3
            Block 3001
            Block 3002
            Block 3003
            Block 3004
            Block 3005
            Block 3006
            Block 3007
    Tract: 242100
    Tract: 242200
    Tract: 242300
    Tract: 242400
        Blockgroup: 1
            Block 1000
            Block 1001
            Block 1002
            Block 1003
            Block 1004
            Block 1005
            Block 1006
            Block 1007
            Block 1008
            Block 1015
    Tract: 242500
    Tract: 242600
    Tract: 242700
    Tract: 243000
        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
    Tract: 243100
        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 2015
    Tract: 243200
        Blockgroup: 1
        Blockgroup: 2
            Block 2000
            Block 2001
            Block 2002
            Block 2003
            Block 2004
            Block 2005
            Block 2006
            Block 2009
            Block 2010
            Block 2011
            Block 2012
            Block 2013
            Block 2014
            Block 2015
            Block 2017
            Block 2018
            Block 2019
            Block 2021
            Block 2022
    Tract: 243300
        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 2018
            Block 2019
            Block 2020
            Block 2021
    Tract: 243400
        Blockgroup: 1
            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
        Blockgroup: 2
            Block 2000
            Block 2001
            Block 2002
            Block 2003
            Block 2008
            Block 2009
        Blockgroup: 3
            Block 3000
            Block 3001
            Block 3002
            Block 3003
            Block 3004
            Block 3005
            Block 3006
            Block 3007
            Block 3008
            Block 3009
            Block 3010
    Tract: 243500
        Blockgroup: 1
            Block 1000
    Tract: 831200
    Tract: 832400
    Tract: 836600
        Blockgroup: 1
            Block 1000
            Block 1001
            Block 1002
            Block 1003
            Block 1004
            Block 1006
            Block 1007
            Block 1008
            Block 1009
            Block 1030
        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 2018
            Block 2019
            Block 2020
            Block 2021
            Block 2022
    Tract: 842300
        Blockgroup: 1
            Block 1083
            Block 1084
            Block 1085
            Block 1087
            Block 1088
            Block 1090
            Block 1091
            Block 1092
            Block 1093
            Block 1094
            Block 1095
            Block 1096
(Source: P.A. 97-6, eff. 6-3-11.)