Voter file loaded June 8, 2026 · figures are from that file, held as a fixed record
Cortland County, New York has 28,859 active registered voters — 37.0% Republican, 29.1% Democratic, and 27.6% with no party affiliation, as of June 2026.
Party registration
How Cortland County voted for president
Election results are public records.
Cortland County at a glance.
Cortland County had an estimated 45,945 residents in July 2024, the 51st most populous of New York's 62 counties, down 1.8% since the 2020 census. Of those, 37,604 are 18 or older, the voting-age population, and 18.3% are 65 or older. Its 28,859 active registered voters equal about 76.7% of that voting-age population.
It covers 499 square miles of land (92 people per square mile). The largest towns and cities are Cortland (17,459), Cortlandville (8,192), Homer (6,106), Virgil (2,387) and Marathon (1,970). The American Community Survey (2020-2024) puts it at a median age of 37.0, a median household income of $70,418, 29.1% of adults 25 and older holding a bachelor's degree or higher and 66.3% of occupied homes owned by the people living in them.
In 2024, 21,996 votes were cast for president, about 58.5% of the voting-age population; the Democratic ticket took 46.8% and the Republican ticket 53.2%. The two-party margin moved from D+9.9 in 2008 to R+6.4 in 2024.
- Population (2024 estimate)
- 45,945
- Population (2020 census base)
- 46,808
- Voting-age population (18+)
- 37,604
- Active voters per 100 adults
- 76.7
- Residents 65 and older
- 18.3%
- People per square mile
- 92
- Land area
- 499 sq mi
- Median age
- 37.0
- Median household income
- $70,418
- Adults 25+ with a bachelor's degree
- 29.1%
- Owner-occupied homes
- 66.3%
Largest towns and cities
- Cortland 17,459
- Cortlandville 8,192
- Homer 6,106
- Virgil 2,387
- Marathon 1,970
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 46.8% | 53.2% | R+6.4 | 21,996 |
| 2020 | 47.8% | 49.8% | R+2.0 | 21,678 |
| 2016 | 43.3% | 50.0% | R+6.7 | 18,424 |
| 2012 | 53.4% | 44.6% | D+8.8 | 17,698 |
| 2008 | 54.1% | 44.2% | D+9.9 | 21,920 |
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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