2010 was a midterm election year in the United States. The primaries and general elections for Cook County races coincided with those for federal (House and Senate) and those for state elections.
Voter turnout
Voter turnout in Cook County during the primaries was 26.41%, with 761,626 ballots cast. The city of Chicago saw 27.282% turnout and suburban Cook County saw 25.54% turnout.[3][4]
The general election saw 52.68% turnout, with 1,424,959 ballots cast. The city of Chicago saw 52.88% turnout and suburban Cook County saw 52.48% turnout.[5][6]
In the 2010 Cook County Assessor election, incumbent third-term Assessor James Houlihan, a Democrat, did not seek reelection. Joseph Berrios was elected to succeed him.
In the 2010 President of the Cook County Board of Commissioners election, incumbent President Todd Stroger, a Democrat appointed in 2006 and elected outright to a full term later that year, lost reelection, being unseated in the Democratic primary by Toni Preckwinkle, who went on to win the general election.
The 2010 Cook County Board of Commissioners election saw all seventeen seats of the Cook County Board of Commissioners up for election to four-year terms.
1st district
Incumbent third-term Commissioner Earlean Collins, a Democrat, was reelected.
Primaries
Democratic
Cook County Board of Commissioners 1st district Democratic primary[2]
Incumbent sixth-term Commissioner Joseph Mario Moreno, a Democrat, lost reelection, being unseated in the Democratic primary by Jesús "Chuy" García, who went on to win the general election.
Primaries
Democratic
Cook County Board of Commissioners 7th district Democratic primary[2]
Incumbent Commissioner Edwin Reyes, a Democrat, who been appointed in 2009 after Roberto Maldonado resigned to serve a Chicago alderman, was elected to a full term.
Primaries
Democratic
Cook County Board of Commissioners 8th district Democratic primary[2]
Incumbent Commissioner Bridget Gainer, a Democrat first appointed in 2009 (to fill the vacancy left after Mike Quigley resigned to assume office as the United States congressman), was elected to a full term.
Primaries
Democratic
Cook County Board of Commissioners 10th district Democratic primary[2]
No candidates, ballot-certified or formal write-in, ran in the Republican primary.[2] The Republican Party ultimately nominated William C. "Bill" Miceli.
Green
No candidates, ballot-certified or formal write-in, ran in the Green primary.[2]
General election
Cook County Board of Commissioners 12th district election[1]
In the 2010 Cook County Board of Review election, one seat, Democratic-held, out of its three seats was up for election.
The Cook County Board of Review has its three seats rotate the length of terms. In a staggered fashion (in which no two seats have coinciding two-year terms), the seats rotate between two consecutive four-year terms and a two-year term.[20]
1st district
Incumbent first-term member Brendan F. Houlihan, a Democrat who had been elected in 2006, lost reelection to Republican Dan Patlak. This election was to a two-year term.[20]
Primaries
Democratic
Cook County Board of Review 1st district Republican primary[2]
In the 2010 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 race.[2] Since three six-year seats were up for election, voters could vote for up to three candidates and the top-three finishers would win.
Two of the incumbents for the three seats were seeking reelection, Democrats Barbara McGowan and Mariyana T. Spyropoulos.[21] Each won reelection, joined by fellow Democrat Michael A. Alvarez in winning election.
Primaries
Democratic
Water Reclamation District Board election Democratic primary[2]