Cities in Rensselaer County, New York by Population (2024)

There are 19 cities in Rensselaer County, New York.

Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)

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2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Troy1New York50,45351,337-0.44%4,87110.36
Rensselaer2New York9,2869,2100.21%2,9213.18
East Greenbush3New York6,5956,2990.18%1,6843.92
Hampton Manor4New York5,5275,1611.69%1,8443
Mechanicville5New York5,1165,162-0.21%6,0980.84
Wynantskill6New York3,9253,4203.18%1,1483.42
West Sand Lake7New York3,2173,391-1.32%6754.77
Hoosick Falls8New York3,1203,202-0.64%1,9521.60
Valatie9New York1,8571,6472.94%1,4811.25
Averill Park10New York1,5881,466-0.63%3934.04
Niverville11New York1,5121,4141.68%5262.87
Castleton-on-Hudson12New York1,4511,467-0.27%2,0320.71
Nassau13New York1,0741,102-0.65%1,5360.70
Nassau Lake14New York9187624.44%6031.52
Round Lake15New York8898152.18%7921.12
Poestenkill16New York694814-4.14%1185.88
Schaghticoke17New York548560-0.54%7230.76
East Nassau18New York511521-0.39%1054.86
Valley Falls19New York447457-0.45%9650.46

Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.

What is the largest city in Rensselaer County, New York?

Troy is the largest city in Rensselaer County.

What is the smallest city in Rensselaer County, New York?

Valley Falls is the smallest city in Rensselaer County.

How many cities are in Rensselaer County?

There are 19 cities in Rensselaer County, New York.

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