The Illinois State Senate Election of 2016 determined, along with 19 senators not up for re-election, the membership of the 100th Illinois State Senate. The Democratic Party retained its majority, losing two seats - the 47th district in Western Illinois, and the 59th in the State's South - which were both won by Republicans. Overview Elections by district District 1 District 2 District 4 District 5 District 7 District 8 District 10 District 11 District 13 District 14 District 16 District 17 District 19 District 20 District 22 District 23 District 25 District 26 District 28 District 29 District 31 District 32 District 34 District 35 District 37 District 38 District 40 District 41 District 43 District 44 District 46 District 47 District 49 District 50 District 52 District 53 District 55 District 56 District 58 District 59 References Illinois State Board of Elections Illinois Senate elections 2016 Illinois elections Illinois Senate