Tompkins County, New York
County seat: Ithaca · Population 104,047 (2025) · 475 sq mi
Tompkins County is the 28th most populous of New York's 62 counties, with 104,047 people (2025 estimate). Its county seat is Ithaca. The map shows its 7 cities and towns and the 6 neighboring counties.
Tompkins County facts
- County seat
- Ithaca
- Population (2025 estimate)
- 104,047 −1.6% since 2020
- Land area
- 475 sq mi 46th largest of 62
- Water area
- 17 sq mi
- Population density
- 219 per sq mi
- Established
- 1817
- Named after
- Daniel D. Tompkins American politician; sixth vice president of the United States (1774–1825)
- Largest city
- Ithaca 33,632
- Median household income
- $74,024
- Cities and towns
- 7 plus 14 CDPs
- ZIP codes
- 18
- Time zone
- Eastern
- FIPS code
- 36109
Cities and towns in Tompkins County
Tompkins County has 7 incorporated cities, towns and villages. Populations count the people living inside Tompkins County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Ithaca (county seat) | City | 33,632 | |
| Cayuga Heights | Village | 3,860 | |
| Lansing | Village | 3,814 | |
| Groton | Village | 2,077 | |
| Dryden | Village | 1,820 | |
| Trumansburg | Village | 1,755 | |
| Freeville | Village | 443 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| South Hill | 6,951 | |
| Northeast Ithaca | 2,661 | |
| Northwest Ithaca | 2,225 | |
| East Ithaca | 1,918 | |
| South Lansing | 1,496 | |
| Forest Home | 1,303 | |
| Newfield | 999 | |
| Varna | 687 | |
| Jacksonville | 592 | |
| Danby | 540 | |
| McLean | 410 | |
| Brooktondale | 327 | |
| Slaterville Springs | 130 | |
| West Danby | 75 |
ZIP codes in Tompkins County
18 ZIP codes reach into Tompkins County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 13045 also Cortland and Cayuga counties
- 13053 also Cortland County
- 13062
- 13068
- 13073 also Cayuga County
- 13092 also Cayuga County
- 13102
- 13736 also Tioga and Broome counties
- 13864 also Tioga County
- 14817 also Tioga County
- 14850
- 14853
- 14854
- 14867 also Chemung County
- 14881
- 14882
- 14883 also Tioga County
- 14886 also Schuyler and Seneca counties
Population of Tompkins County, 2020–2025
Tompkins County shrank by 1,688 people (−1.6%) between April 2020 and July 2025: 498 more deaths than births and a net loss of 1,049 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 105,508 |
| 2021 | 102,567 |
| 2022 | 104,177 |
| 2023 | 104,453 |
| 2024 | 104,394 |
| 2025 | 104,047 |
Neighboring counties
- Tioga County southeast · 47,453 people
- Schuyler County west · 16,924 people
- Cayuga County north · 74,365 people
- Cortland County northeast · 45,850 people
- Seneca County northwest · 32,883 people
- Chemung County southwest · 80,415 people
Printable Tompkins County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (111 KB)
- PNG (2400 px) (90 KB)
Paste this code to embed the map on your site:
Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
Back to the New York county map with all 62 counties. Found an error? Tell us.