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

The community of Syracuse is the Seat for Onondaga County.

Onondaga County was founded in 1792 and was created by taking area from HerkimerCounty.

From the Census Estimates for 2009, <1> Onondaga had a population of 454,753 people. This is a decrease of 0.78% since the last Census (which gave a population of 458,336 people in 2000).

At the time of the 2000 Census, Onondaga represented 2.42% of the total population of New York, making it the state's 10th 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.

YearPopulationChange
Since 2000
Year-to-Year Change
2010467,026+1.9%+2.7% since 2009
2009454,753-0.78%+0.3% since 2008
2008453,373-1.08%+0.09% since 2007
2007452,944-1.18% 
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2000458,336The Last Census

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

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

Community 2009
Population
2000
Population
Change
(2009vs. 2000)
Syracuse   138,560147,3065.94% decrease  
Clay   58,78558,805  
Salina   32,48933,2902.41% decrease  
Manlius   32,29931,8721.34% increase  
Cicero   30,31427,9828.33% increase  

Websites for Onondaga County

Official Website:   www.ongov.net/

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