Montgomery County, New York
County seat: Fonda · Population 50,046 (2025) · 403 sq mi
Montgomery County is the 46th most populous of New York's 62 counties, with 50,046 people (2025 estimate). Its county seat is Fonda. The map shows its 10 cities and towns and the 6 neighboring counties.
Montgomery County facts
- County seat
- Fonda
- Population (2025 estimate)
- 50,046 +1% since 2020
- Land area
- 403 sq mi 49th largest of 62
- Water area
- 7 sq mi
- Population density
- 124 per sq mi
- Established
- 1772
- Same name
- One of 18 Montgomery Counties in the US
- Named after
- Richard Montgomery Irish-born soldier in the British Army, later in the American Continental Army (1738–1775)
- Largest city
- Amsterdam 18,093
- Median household income
- $64,943
- Cities and towns
- 10 plus 2 CDPs
- ZIP codes
- 20
- Time zone
- Eastern
- FIPS code
- 36057
Cities and towns in Montgomery County
Montgomery County has 10 incorporated cities, towns and villages. Populations count the people living inside Montgomery County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Amsterdam | City | 18,093 | |
| Canajoharie | Village | 2,059 | |
| Fort Plain | Village | 2,005 | |
| St. Johnsville | Village | 1,706 | |
| Hagaman | Village | 1,119 | |
| Palatine Bridge | Village | 792 | |
| Fultonville | Village | 790 | |
| Fonda (county seat) | Village | 688 | |
| Nelliston | Village | 564 | |
| Ames | Village | 138 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Tribes Hill | 959 | |
| Fort Johnson | 364 |
ZIP codes in Montgomery County
20 ZIP codes reach into Montgomery County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 12010 also Fulton, Saratoga and Schenectady counties
- 12053 also Schenectady, Albany and Schoharie counties
- 12066 also Schoharie and Schenectady counties
- 12068 also Fulton County
- 12069
- 12070 also Fulton County
- 12072
- 12086 also Saratoga and Fulton counties
- 12095 also Fulton County
- 12137 also Schenectady County
- 12160 also Schoharie County
- 12166 also Schoharie County
- 12177
- 13317 also Otsego County
- 13320 also Otsego County
- 13339 also Herkimer and Fulton counties
- 13410
- 13428
- 13452 also Fulton County
- 13459 also Schoharie and Otsego counties
Population of Montgomery County, 2020–2025
Montgomery County grew by 512 people (+1%) between April 2020 and July 2025: 372 more deaths than births and a net gain of 911 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 49,499 |
| 2021 | 49,512 |
| 2022 | 49,454 |
| 2023 | 49,531 |
| 2024 | 49,580 |
| 2025 | 50,046 |
Neighboring counties
- Fulton County north · 52,216 people
- Schoharie County south · 30,176 people
- Schenectady County east · 162,581 people
- Herkimer County northwest · 59,219 people
- Otsego County southwest · 60,589 people
- Saratoga County northeast · 241,343 people
Printable Montgomery 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) (109 KB)
- PNG (2400 px) (77 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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