Noonan Beats Moore in DuPage GOP Sheriff Primary

Oakbrook Terrace Police Officer Sean Noonan won a decisive victory in the Republican primary for DuPage County Sheriff, defeating Undersheriff Eddie Moore by a wide margin and advancing to the general election in November.

Noonan, a former DuPage County Board member who has spent 23 years in law enforcement, received 30,157 votes, or 66.5%, compared to Moore’s 15,232 votes, or 33.5%, a roughly two-to-one margin and a lead of nearly 15,000 votes, according to the DuPage County Clerk’s Office.

“I’m grateful, I am humbled,” Noonan told the DuPage Policy Journal of the victory.

The primary was shaped by heightened scrutiny of Moore, a 30-year veteran of the DuPage County Sheriff’s Office seen as the hand-picked successor to outgoing Sheriff Jim Mendrick.

In the hours following his victory, Noonan thanked supporters in a social media post, writing “From the bottom of my heart, thank you,” and emphasizing that “this victory belongs to you.”

“As we look ahead to November, it is time to come together, not just as Republicans, but as residents of DuPage County who care deeply about our community,” Noonan said on social media. “We are united by common goals that go beyond party lines: safe neighborhoods, strong support for the men and women who serve in law enforcement, responsible stewardship of taxpayer dollars, and a clear commitment to public safety.”

Noonan outperformed Moore across all vote types. “I beat them in the early voting in person, I beat them on Election Day in person and then in the vote by mail,” he said. “I’m pretty excited.”

He credited his campaign’s financial advantage and broad outreach strategy as key factors in the win. “I felt like the townships were mostly behind my opponent, so I had to overcome that,” Noonan said. “And then I just outworked them. I outwork them and I raised more money than them. And that gave me a huge advantage.”

Looking ahead to the Nov. 3 general election, Noonan said he is preparing for a competitive race against Democrat Peter Joseph Coolidge, who ran unopposed in his primary.