This page provides interactive US Senate election maps for Ohio and its counties. The maps show votes, party margins and more through history.
Because of the way Senate elections are held, with each seat staggered every few years, the margin shift maps will be based on seat rather than year. For example, the 2022 and 2016 elections were for the same seat, just as the 2018 and 2012 elections were for the other seat. So the margin shift maps will be 2016 to 2020 and 2012 to 2018, respectively, and so on. The seats will also be broken up as Seat 1 and Seat 2.
**Last Updated: 8/7/2024- Added the 2004 election for Seat 1 and the 2004-2010 margin shift map.
Seat 1
2022
J.D Vance (R) vs. Tim Ryan (D)
Total Votes: 4,032,750
Total Republican Votes: 2,147,898: 53.26%
Total Democratic Votes: 1,883,223: 46.70%
Total Other Votes: 1,629: 0.04%
R vs D Margin: +6.56
2016-2022 Margin Shift
Total Votes: -1,341,414 -24.96%
Republican Votes: -970,669 -31.13%
Democratic Votes: -113,685 -5.69%
Other Votes: -257,060 -99.37%
Overall R vs D Shift: -14.31
2016
Rob Portman (R) vs. Ted Strickland (D)
Total Votes: 5,374,164
Total Republican Votes: 3,118,567: 58.03%
Total Democratic Votes: 1,996,908: 37.16%
Total Other Votes: 258,689: 4.81%
R vs D Margin: +20.87
2010-2016 Margin Shift
Total Votes: +1,559,066 +40.87%
Republican Votes: +949,825 +43.8%
Democratic Votes: +493,611 +32.84%
Other Votes: +115,630 +80.83%
Overall R vs D Shift: +3.43
2010
Rob Portman (R) vs. Lee Fisher (D)
Total Votes: 3,815,098
Total Republican Votes: 2,168,742: 56.85%
Total Democratic Votes: 1,503,297: 39.4%
Total Other Votes: 143,059: 3.75%
R vs D Margin: +17.45
2004-2010 Margin Shift
Total Votes: -1,611,198 -26.69%
Republican Votes: -1,295,909 -37.4%
Democratic Votes: -457,952 -23.35%
Other Votes: +142,763 +48,230.74%
Overall R vs D Shift: -10.26
2004
George Voinovich (R) vs. Eric Fingerhut (D)
Total Votes: 5,426,196
Total Republican Votes: 3,464,651 63.85%
Total Democratic Votes: 1,961,249 36.14%
Total Other Votes: 296 0.01%
R vs D Margin: +27.71
Seat 2
2018
Jim Renacci (R) vs. Sherrod Brown (D)
Total Votes: 4,410,898
Total Republican Votes: 2,053,963: 46.57%
Total Democratic Votes: 2,355,923: 53.41%
Total Other Votes: 1,012: 0.02%
R vs D Margin: -6.84
2012-2018 Margin Shift
Total Votes: -1,223,119 -21.71%
Republican Votes: -381,781 -15.67%
Democratic Votes: -406,843 -14.73%
Other Votes: -434,495 -99.77%
Overall R vs D Shift: -1.04
2012
Josh Mandel (R) vs. Sherrod Brown (D)
Total Votes: 5,634,017
Total Republican Votes: 2,435,744 43.23%
Total Democratic Votes: 2,762,766 49.04%
Total Other Votes: 435,507 7.73%
R vs D Margin: -5.81
2006-2012 Margin Shift
Total Votes: +1,614,610 +40.17%
Republican Votes: +674,652 +38.31%
Democratic Votes: +505,281 +22.38%
Other Votes: +434,677 +52,370.72%
Overall R vs D Shift: +6.55
2006
Mike DeWine (R) vs. Sherrod Brown (D)
Total Votes: 4,019,407
Total Republican Votes: 1,761,092 43.81%
Total Democratic Votes: 2,257,485 56.16%
Total Other Votes: 830 0.03%
R vs D Margin: -12.35
