Voter turnout in Cook County during the primaries was 24.03%, with 644,701 ballots cast. Among these, 440,873 Democratic, 200,750 Republican, 112 Green, and 2,966 nonpartisan primary ballots were cast. The city of Chicago saw 24.46% turnout, its lowest turnout for a presidential primary on record. Suburban Cook County saw 23.63% turnout. The general election saw 70.59% turnout, with 2,030,563 ballots cast. Chicago saw 73.01% turnout and suburban Cook County saw 70.70% turnout.
In the 2012 Clerk of the Circuit Court of Cook County election, incumbent third-term Clerk Dorothy A. Brown, a Democrat, was reelected.
Primaries
Democratic
Republican
No candidates, ballot-certified or formal write-in, ran in the Republican primary. The Republican Party ultimately nominated Diane S. Shapiro.
General election
Recorder of Deeds
In the 2012 Cook County Recorder of Deeds election election, incumbent Recorder of Deeds Eugene Moore, a Democrat, did not seek reelection. Moore had served as Recorder of Deeds since 1999. Karen Yarbrough was elected to succeed him.
Primaries
Democratic
Republican
No candidates, ballot-certified or formal write-in, ran in the Republican primary. The Republican Party ultimately nominated Sherri Griffith.
General election
State's Attorney
In the 2012 Cook County State's Attorney election, incumbent first-term State's Attorney Anita Alvarez, a Democrat, was reelected. Only Democrats had held this office ever since Richard A. Devine unseated Republican Jack O'Malley in 1996.
Primaries
Democratic
Republican
No candidates, ballot-certified or formal write-in, ran in the Republican primary. The Republican Party ultimately nominated Lori S. Yokoyama.
In the 2012 Cook County Board of Review election, all three seats, two Democratic-held and one Republican-held, were up for election. All incumbents won reelection. The Cook County Board of Review has its three seats rotate the length of terms. In a staggered fashion, the seats rotate between two consecutive four-year terms and a two-year term. This was the first year since 2002 that all three seats were coincidingly up for election. As these were the first elections held following the 2010 United States Census, the seats faced redistricting before this election.
1st district
Incumbent first-term member Dan Patlak, a Republican first elected in 2010, was reelected. This election was to a four-year term.
Primaries
Democratic
Republican
General election
2nd district
Incumbent member Michael Cabonargi, a Democrat appointed in 2011 after Joseph Berrios resigned to assume office as Cook County Assessor, was reelected to a full term, running unopposed in both the Democratic primary and general election. This election was to a four-year term.
Primaries
Democratic
Republican
No candidates, ballot-certified or formal write-in, ran in the Republican primary.
General election
3rd district
Incumbent second-term member Larry Rogers, a Democrat, was reelected, running unopposed in both the Democratic primary and general election. Rogers had last been reelected in 2008. This election was to a two-year term.
Primaries
Democratic
Republican
No candidates, ballot-certified or formal write-in, ran in the Republican primary.
In the 2012 Metropolitan Water Reclamation District of Greater Chicago election, three of the nine seats on the Metropolitan Water Reclamation District of Greater Chicago board were up for election in an at-large election. Incumbent Democrats Debra Shore and Patricia Horton sought reelection. Horton failed to garner renomination, thus losing reelection. Shore won reelection. Joining Shore in winning the general election were Democrats Kari K. Steele and Patrick Daley Thompson.
Primaries
Democratic
Republican
General election
Judicial elections
12 judgeships on the Circuit Court of Cook County were up for partisan elections due to vacancies. 56 Circuit Court judgeships were up for retention elections. 23 subcircuit court judgeships were also up for partisan elections due to vacancies. Multiple subcircuit court judgeships were also up for retention elections.
