Deb Conroy won the race for DuPage County Board Chair, according to unofficial results from DuPage County Clerk. Conroy received 183,884 votes, or 63.4%, to Grasso's 106,276 votes, or 36.6%. That's a margin of 77,608 votes and 26.8 percentage points out of 290,160 votes counted. All 600 of 600 reporting units have reported.

The DuPage County Clerk last updated the results Tuesday, Nov. 3, at 9:36 p.m. As we reported Nov. 2, Naperville voters headed to the polls Tuesday with the DuPage County Board Chair race on the ballot. Naperville sits in DuPage County, putting the chair race on ballots across the city.

Naperville residents can view full results at the DuPage County Clerk's election results page.

Election results: DuPage County Board Chair (Illinois General Election, 2026-11-03)

Candidate

Party

Votes

Percent

DEB CONROY

183,884

63.4%

GARY GRASSO

106,276

36.6%

Total

290,160

Source: DuPage County Clerk. Results current as of Nov. 3, 2026, 9:36 p.m. CST. Reporting: 600 of 600. Unofficial results; every reporting unit has reported.