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.
The Democratic Party ran candidates in races for all seventeen seats, while the Republican Party contested eleven seats. The Green Party contested ten races (an increase from the single seat they contested in 2006). Democrats increased their majority, flipping a control of a previously-Republican seat. However, Democrats also saw a more than 9-point decline in their share of the cumulative popular vote: with Republicans and Greens each seeing a more than 4.5-point increase.
The previous elections to the board had been held in 2006. The 2006 elections had been a wave election for Democrats nationally. The 2010 elections, by contrast, were a wave election for the Republicans nationally, with impacts of that wave seen in Illinois elections.
Incumbent third-term Commissioner Earlean Collins, a Democrat, was reelected.
No candidates, ballot-certified or formal write-in, ran in the Republican primary.
Incumbent first-term commissioner Robert Steele, a Democrat, was reelected.
No candidates, ballot-certified or formal write-in, ran in the Republican primary.
Incumbent Commissioner Jerry Butler, a Democrat who first assumed the office in 1985, was reelected.
No candidates, ballot-certified or formal write-in, ran in the Republican primary.
No candidates, ballot-certified or formal write-in, ran in the Green primary. The Green Party ultimately nominated Marie J. "Jenny" Wohadlo.
Incumbent first-term Commissioner William Beavers, a Democrat, was reelected.
No candidates, ballot-certified or formal write-in, ran in the Republican primary.
Incumbent fourth-term Commissioner Deborah Sims, a Democrat, was reelected.
No candidates, ballot-certified or formal write-in, ran in the Green primary.
Incumbent second-term Commissioner Joan Patricia Murphy, a Democrat, was reelected.
Sandra Czyznikiewicz defeated former 6th district Commissioner William Moran and Michael Hawkins in the Republican primary.
No candidates, ballot-certified or formal write-in, ran in the Green primary.
Incumbent fifth-term Commissioner Joseph Mario Moreno, a Democrat, lost reelection, being unseated in the Democratic primary by Jesús "Chuy" GarcÃÂa, who went on to win the general election.
No candidates, ballot-certified or formal write-in, ran in the Republican primary.
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.
No candidates, ballot-certified or formal write-in, ran in the Republican primary.
No candidates, ballot-certified or formal write-in, ran in the Green primary.
Incumbent fourth-term Commissioner Peter N. Silvestri, a Republican, was reelected.
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.
No candidates, ballot-certified or formal write-in, ran in the Republican primary. The Republican Party ultimately nominated Wes Fowler.
No candidates, ballot-certified or formal write-in, ran in the Republican primary.
Incumbent Commissioner John P. Daley, a Democrat in office since 1992, was reelected.
No candidates, ballot-certified or formal write-in, ran in the Republican primary.
Incumbent second-term Commissioner Forrest Claypool, a Democrat, did not seek reelection. John Fritchey was elected to succeed him.
No candidates, ballot-certified or formal write-in, ran in the Republican primary. The Republican Party ultimately nominated William C. "Bill" Miceli.
No candidates, ballot-certified or formal write-in, ran in the Green primary.
Incumbent second-term Commissioner Larry Suffredin, a Democrat, was reelected.
Incumbent third-term Commissioner Gregg Goslin, a Republican, was reelected.
No candidates, ballot-certified or formal write-in, ran in the Green primary.
Incumbent first-term Commissioner Tim Schneider, a Republican, was reelected.
No candidates, ballot-certified or formal write-in, ran in the Green primary. The Green Party ultimately nominated Laura Ehorn.
Incumbent second-term Commissioner Tony Peraica, a Republican, lost reelection to Democrat Jeff Tobolski.
Incumbent second-term Commissioner Elizabeth Ann Doody Gorman, a Republican, was reelected.