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

The community of Waterloo is the Seat for Seneca County.

Seneca County was founded in 1804 and was created by taking area from CayugaCounty.

From the Census Estimates for 2009, <1> Seneca had a population of 34,049 people. This is an increase of 2.12% since the last Census (which gave a population of 33,342 people in 2000).

At the time of the 2000 Census, Seneca represented 0.18% of the total population of New York, making it the state's 57th 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
201035,251+5.73%+3.53% since 2009
200834,060+2.15%-0.63% since 2007
200033,342The Last Census

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


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

Community 2009
(2009vs. 2000)
Seneca Falls   9,0799,3472.87% decrease  
Waterloo   7,6507,8662.75% decrease  
Seneca Falls   6,6356,8613.29% decrease  
Waterloo   4,9805,1112.56% decrease  
Fayette   3,6033,6431.1% decrease  

Websites for Seneca County

Official Website:   www.co.seneca.ny.us/

If you know of a history or genealogy society whose interest includes Seneca 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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