Ohio's 10th Congressional District (2026)

The Dayton-based U.S. House seat — safely Republican, and one the 2025 remap made safer still. OH-10 now contains all of Montgomery and Greene counties plus Middletown.

The matchup

• Republican incumbent: Mike Turner (in the House since 2003; re-elected 57.6% in 2024), unopposed in the primary.
• Democratic: Kristina Knickerbocker, a Yellow Springs nurse practitioner and former Wright-Patterson Air Force Base officer, who won a six-way primary.
• Also on the ballot: Libertarian Tom McMasters.

The setup

• The 2025 map moved OH-10 from about Trump +6 to Trump +8, dropping Democratic-leaning Springfield (Clark County) into Jim Jordan's OH-4 and adding Republican Middletown. Under the old lines the district narrowly backed Sherrod Brown; the new version does not.
• Rating: Safe Republican. Turner holds roughly a 10-point advantage; no forecaster calls it a battleground.

The stakes

OH-10 is the counterpart to OH-1 and OH-9 — another seat the remap nudged rightward — and the clearest illustration in this metro of the gap between a swing county (Montgomery is closely divided) and a safe seat (OH-10 is not). The competitive races in the Dayton area are all below the congressional line.