2010 Cook County Board of Commissioners election

The 2010 Cook County Board of Commissioners election was held on November 2, 2010. It was preceded by a primary election held on February 5, 2010. It coincided with other 2010 Cook County, Illinois, elections (including the election for president of the Cook County Board of Commissioners). It saw all seventeen seats of the Cook County Board of Commissioners up for election to four-year terms.

Democrats increased their majority, flipping a control of a previously-Republican seat. The Democratic Party ran candidates in races for all seventeen seats, while the Republican Party contested eleven seats and the Green Party contested ten races.

1st district
Incumbent third-term Commissioner Earlean Collins, a Democrat, was reelected.

Republican
No candidates, ballot-certified or formal write-in, ran in the Republican primary.

2nd district
Incumbent first-term commissioner Robert Steele, a Democrat, was reelected.

Republican
No candidates, ballot-certified or formal write-in, ran in the Republican primary.

3rd district
Incumbent Commissioner Jerry Butler, a Democrat who first assumed the office in 1985, was reelected.

Republican
No candidates, ballot-certified or formal write-in, ran in the Republican primary.

Green
No candidates, ballot-certified or formal write-in, ran in the Green primary. The Green Party ultimately nominated Marie J. "Jenny" Wohadlo.

4th district
Incumbent first-term Commissioner William Beavers, a Democrat, was reelected.

Republican
No candidates, ballot-certified or formal write-in, ran in the Republican primary.

5th district
Incumbent fourth-term Commissioner Deborah Sims, a Democrat, was reelected.

Green
No candidates, ballot-certified or formal write-in, ran in the Green primary.

6th district
Incumbent second-term Commissioner Joan Patricia Murphy, a Democrat, was reelected.

Republican
Sandra Czyznikiewicz defeated former 6th district Commissioner William Moran and Michael Hawkins in the Republican primary.

Green
No candidates, ballot-certified or formal write-in, ran in the Green primary.

7th district
Incumbent fifth-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.

Republican
No candidates, ballot-certified or formal write-in, ran in the Republican primary.

8th district
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.

Republican
No candidates, ballot-certified or formal write-in, ran in the Republican primary.

Green
No candidates, ballot-certified or formal write-in, ran in the Green primary.

9th district
Incumbent fourth-term Commissioner Peter N. Silvestri, a Republican, was reelected.

10th district
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.

Republican
No candidates, ballot-certified or formal write-in, ran in the Republican primary. The Republican Party ultimately nominated Wes Fowler.

Green
No candidates, ballot-certified or formal write-in, ran in the Republican primary.

11th district
Incumbent Commissioner John P. Daley, a Democrat in office since 1992, was reelected.

Green
No candidates, ballot-certified or formal write-in, ran in the Republican primary.

12th district
Incumbent second-term Commissioner Forrest Claypool, a Democrat, did not seek reelection. John Fritchey was elected to succeed him.

Republican
No candidates, ballot-certified or formal write-in, ran in the Republican primary. The Republican Party ultimately nominated William C. "Bill" Miceli.

Green
No candidates, ballot-certified or formal write-in, ran in the Green primary.

13th district
Incumbent second-term Commissioner Larry Suffredin, a Democrat, was reelected.

14th district
Incumbent third-term Commissioner Gregg Goslin, a Republican, was reelected.

Green
No candidates, ballot-certified or formal write-in, ran in the Green primary.

15th district
Incumbent first-term Commissioner Tim Schneider, a Republican, was reelected.

Green
No candidates, ballot-certified or formal write-in, ran in the Green primary. The Green Party ultimately nominated Laura Ehorn.

16th district
Incumbent second-term Commissioner Tony Peraica, a Republican, lost reelection to Democrat Jeff Tobolski.

17th district
Incumbent second-term Commissioner Elizabeth Ann Doody Gorman, a Republican, was reelected.