HOUSE
Ohio OH-01 House2026
RACE AT A GLANCE
RACE TYPE
Incumbent running
Greg Landsman (D)
COOK PARTISAN VOTING INDEX
Last updated : Nov 17, 2025D +50
R +50
R +1
Race summary
Last year, Ohio’s Cincinnati-based 1st District was redrawn to include more of rural southwest Ohio (Clinton and Warren counties), turning it into a district that would have voted for Donald Trump by 2.5 points in 2024.Key Dates
Filing Deadline: Feb 4, 2026
Primary Election: May 5, 2026
INCUMBENT
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CANDIDATES
Democrats
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Republicans
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DISTRICT DATA
Ohio - 01
Cincinnati, Warren County, Clinton County
Population Breakdown
Source: 2020 Census (VAP) for 2026
Past Presidential Results from this District
2024 Election Results
Source: Dave Leip
2020 Election Results
Source: Dave's Redistricting/VEST
RACE ANALYSIS
Race Analysis
Updated: Apr 24, 2026
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