County Maps US

Rensselaer County, New York

A county in New York, ranked 22 of 62 by population.

CountyFIPS 36083

Within New York
Rensselaer County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Troy, the county seat, located via the 2025 Census Gazetteer.

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Population
160,510
-379 (-0.2%) since 2020
Land area
652.5
square miles. A further 1.9% of the total area is water
Population density
246
people per square mile, computed rather than published
County seat
Troy
Seat of county government.
Established
1791
234 years ago
Largest city
Troy city
Population 50,912.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Rensselaer County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Rensselaer County, New York from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 639 by 800 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Rensselaer County ranks

Position among the 62 counties of New York, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn New YorkNationally
Population160,51022nd of 62437th of 3,144
Land area652.5 sq mi32nd of 621,443rd of 3,144
Population density246 per sq mi21st of 62505th of 3,144
Median household income$87,91511th of 62351st of 3,143

Full data for Rensselaer County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population160,510Vintage 2025 Population Estimates
Population in 2020160,889Vintage 2025 Population Estimates
2020 estimates base?161,126Vintage 2025 Population Estimates
Land area652.5 sq mi2025 Gazetteer Files
Water area12.9 sq mi2025 Gazetteer Files
Total area665.4 sq mi2025 Gazetteer Files
Population density?246 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$87,915American Community Survey 2020-2024 5-Year Estimates
Median home value$258,400American Community Survey 2020-2024 5-Year Estimates
Median age40.1American Community Survey 2020-2024 5-Year Estimates
Households66,686American Community Survey 2020-2024 5-Year Estimates
Housing units74,543American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
-128
1,525 births, 1,653 deaths
Net migration
+613
More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 7 areas bordering Rensselaer County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Albany CountyNew York23 mi321,225
Columbia CountyNew York22 mi60,168
Washington CountyNew York20 mi59,353
Berkshire CountyMassachusetts17 mi128,224
Bennington CountyVermont15 mi36,630
Saratoga CountyNew York13 mi241,343
Greene CountyNew Yorka single point47,238

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 62 counties of New York

Open the interactive New York county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.