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Time Zone: Rensselaer County lies in the Eastern Time Zone (EST/EDT) and observes daylight saving time.

The community of Troy is the Seat for Rensselaer County.

Rensselaer County was founded in 1791 and was created by taking area from AlbanyCounty.

From the Census Estimates for 2009, <1> Rensselaer had a population of 155,541 people. This is an increase of 1.97% since the last Census (which gave a population of 152,538 people in 2000).

At the time of the 2000 Census, Rensselaer represented 0.8% of the total population of New York, making it the state's 21st most populous county (out of 62 counties).

The following table shows the recent changes in population. Other than 2000, the population counts have been estimated by the Census Bureau.

Since 2000
Year-to-Year Change
2010159,429+4.52%+2.5% since 2009
2009155,541+1.97%-0.13% since 2008
2008155,751+2.11%+0.29% since 2007
2000152,538The Last Census

More information can be found on the Rensselaer County Census Page for Rensselaer County.


Below are some of the communities located in Rensselaer County (for more communities, please visit our Nearby Page for Rensselaer County):

Community 2009
(2009vs. 2000)
Troy   47,55649,1703.28% decrease  
East Greenbush   16,91015,5608.68% increase  
Schodack   13,11912,5364.65% increase  
North Greenbush   11,85810,8059.75% increase  
Brunswick   11,76911,6640.9% increase  

Websites for Rensselaer County

Official Website:   www.rensco.com/

If you know of a history or genealogy society whose interest includes Rensselaer County, would you please send us the URL for their website? We would like to add their link to our Gazetteer. To contact us, please visit our Feedback Page.

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Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2000 Census and the next count will be for the 2010 Census.

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<2>All Quarter-dollar coin images from the United States Mint.

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