Voter file loaded June 4, 2026 · figures are from that file, held as a fixed record
Belmont County, Ohio has 35,616 active registered voters across 69 precincts, as of June 2026.
Party registration
Ohio doesn't register voters by party, so there's no party breakdown to show. Party lean is usually inferred from primary participation; that data is in the voter file and available inside Motion51.
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | PRECINCT RICHLAND TWP 5 | 668 | 513 | 76.8% |
| 2 | PRECINCT RICHLAND TWP 1 | 560 | 411 | 73.39% |
| 3 | PRECINCT RICHLAND TWP 2 | 706 | 509 | 72.1% |
| 4 | PRECINCT COLERAIN TWP 3 | 723 | 519 | 71.78% |
| 5 | PRECINCT WAYNE TWP | 413 | 296 | 71.67% |
| 6 | PRECINCT ST CLAIRSVILLE 1-A | 530 | 379 | 71.51% |
| 7 | PRECINCT RICHLAND TWP 4 | 704 | 502 | 71.31% |
| 8 | PRECINCT COLERAIN TWP 5 | 491 | 350 | 71.28% |
| 9 | PRECINCT SMITH TWP | 854 | 596 | 69.79% |
| 10 | PRECINCT COLERAIN TWP 4 | 446 | 306 | 68.61% |
Supervoters are active registered voters who cast a ballot in at least 3 of the last 4 November general elections (2018–2024). Percentages are precinct totals from the official state voter file — no individual voter information is shown. Precincts with fewer than 400 active voters are excluded.
How Belmont County voted for president
Election results are public records.
Belmont County at a glance.
Belmont County had an estimated 64,692 residents in July 2024, the 38th most populous of Ohio's 88 counties, down 2.7% since the 2020 census. Of those, 52,865 are 18 or older, the voting-age population, and 23.3% are 65 or older. Its 35,616 active registered voters equal about 67.4% of that voting-age population.
It covers 532 square miles of land (122 people per square mile). The largest cities and towns are Martins Ferry (6,050), St. Clairsville (4,954), Barnesville (3,902), Bellaire (3,745) and Shadyside (3,351). The American Community Survey (2020-2024) puts it at a median age of 44.1, a median household income of $57,017, 18.9% of adults 25 and older holding a bachelor's degree or higher and 73.6% of occupied homes owned by the people living in them.
In 2024, 31,032 votes were cast for president, about 58.7% of the voting-age population; the Democratic ticket took 26.0% and the Republican ticket 73.3%. The two-party margin moved from D+2.7 in 2008 to R+47.3 in 2024.
- Population (2024 estimate)
- 64,692
- Population (2020 census base)
- 66,491
- Voting-age population (18+)
- 52,865
- Active voters per 100 adults
- 67.4
- Residents 65 and older
- 23.3%
- People per square mile
- 122
- Land area
- 532 sq mi
- Median age
- 44.1
- Median household income
- $57,017
- Adults 25+ with a bachelor's degree
- 18.9%
- Owner-occupied homes
- 73.6%
Largest cities and towns
- Martins Ferry 6,050
- St. Clairsville 4,954
- Barnesville 3,902
- Bellaire 3,745
- Shadyside 3,351
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 26.0% | 73.3% | R+47.3 | 31,032 |
| 2020 | 27.6% | 71.2% | R+43.6 | 33,088 |
| 2016 | 28.3% | 67.9% | R+39.6 | 30,537 |
| 2012 | 44.8% | 53.2% | R+8.4 | 30,876 |
| 2008 | 50.3% | 47.6% | D+2.7 | 32,411 |
Sources: U.S. Census Bureau Vintage 2024 population estimates and 2024 Gazetteer; American Community Survey 2020–2024 5-year estimates; certified county presidential returns. Growth, density and turnout are simple arithmetic on those figures.
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