Hamilton County, New York
County seat: Lake Pleasant · Population 5,006 (2025) · 1,717 sq mi
Hamilton County is the 62nd most populous of New York's 62 counties, with 5,006 people (2025 estimate). Its county seat is Lake Pleasant. The map shows its 1 city or town and the 7 neighboring counties.
Hamilton County facts
- County seat
- Lake Pleasant
- Population (2025 estimate)
- 5,006 −1.9% since 2020
- Land area
- 1,717 sq mi 3rd largest of 62
- Water area
- 90 sq mi
- Population density
- 3 per sq mi
- Established
- 1816
- Same name
- One of 10 Hamilton Counties in the US
- Named after
- Alexander Hamilton American Founding Father and statesman (1755/1757–1804)
- Largest city
- Indian Lake 1,344
- Median household income
- $68,835
- Cities and towns
- 1 plus 2 CDPs
- ZIP codes
- 14
- Time zone
- Eastern
- FIPS code
- 36041
Cities and towns in Hamilton County
Hamilton County has 1 incorporated place. Populations count the people living inside Hamilton County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Speculator | Village | 398 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Long Lake | 716 | |
| Wells | 581 |
ZIP codes in Hamilton County
14 ZIP codes reach into Hamilton County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 12032 also Fulton County
- 12108
- 12134 also Saratoga and Fulton counties
- 12139
- 12164
- 12190
- 12812
- 12842
- 12847 also St. Lawrence County
- 12864
- 13331 also Herkimer County
- 13353
- 13360
- 13436
Population of Hamilton County, 2020–2025
Hamilton County shrank by 96 people (−1.9%) between April 2020 and July 2025: 260 more deaths than births and a net gain of 163 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 5,073 |
| 2021 | 5,109 |
| 2022 | 5,102 |
| 2023 | 5,068 |
| 2024 | 5,083 |
| 2025 | 5,006 |
Neighboring counties
- Herkimer County west · 59,219 people
- Essex County northeast · 36,438 people
- Fulton County south · 52,216 people
- Warren County east · 65,020 people
- St. Lawrence County northwest · 105,488 people
- Franklin County north · 46,500 people
- Saratoga County southeast · 241,343 people
Printable Hamilton 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) (88 KB)
- PNG (2400 px) (86 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.
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