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The 2000 Census showed that Onondaga County had a population of 458,336 people. This represented 2.42% of the total population of New York, making it the state's 10th most populous county (out of 62 counties).

From the Census Estimates for 2009<1>, Onondaga had a population of 454,753 people. This is a decrease of 0.78% since the 2000 Census.

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%-0.13% since 2006
2006453,533-1.05%-0.24% since 2005
2005454,625-0.81%-0.4% since 2004
2004456,432-0.42%-0.15% since 2003
2003457,139-0.26% 
2002457,085-0.27% 
2001457,339-0.22%-0.22% since 2000
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2000458,336The Last Census

Onondaga County had 196,633 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Onondaga County has a total area<3> of 805 square miles [2,086 km²]. Of this total, 780 square miles [2,020 km²] of the area is land, with the balance (3.15%) being water (25.4 square miles [65.8 km²]).

Using the above population and land area values, Onondaga County had a population density of 587 people per square mile [226.8 people/km²], making it the state's 13th most densely populated county (out of 62 counties).

US Census QuickFacts

The Census Bureau has created documents containing demographic information that are called QuickFacts. A QuickFact that is specific to Onondaga County is available. The QuickFact also contains a comparison between Onondaga and the state of New York.

Click here for the Onondaga County QuickFact (QF-36067).

Below are some of the communities that are located in Onondaga County:

CommunityCensus
QuickFact		Population
(2009 Est)		Population
(2000 Census)		Change in
  Population
SyracuseQF-3673000138,560147,306-5.94%
ClayQF-361606758,78558,805
SalinaQF-366481532,48933,290-2.41%
ManliusQF-364502932,29931,8721.34%
CiceroQF-361570430,31427,9828.33%
De WittQF-362047824,42224,0711.46%
CamillusQF-361191323,47723,1521.4%
OnondagaQF-365495821,65521,0632.81%
LysanderQF-364403921,52119,28511.59%
GeddesQF-362851916,85917,740-4.97%
Van BurenQF-367676012,64212,667-0.2%
SkaneatelesQF-36675217,3577,3230.46%
BaldwinsvilleQF-36041987,2647,0532.99%
PompeyQF-36590366,7696,1599.9%
North SyracuseQF-36536606,5806,862-4.11%
SolvayQF-36682866,4296,845-6.08%
MarcellusQF-36454916,2936,319-0.41%
ElbridgeQF-36238006,0586,091-0.54%

Below are the counties that adjoin and form the boundaries of Onondaga County. A link to their specific Census QuickFact has been provided.

CountyCensus
QuickFact		DirectionPopulation
(2009 Est.)		Population
(2000 Census)		Change in
Population
CayugaQF-36011   SW79,52681,963-2.97%
CortlandQF-36023   S47,99648,599-1.24%
MadisonQF-36053   E69,95469,4410.74%
OswegoQF-36075   N121,377122,377-0.82%

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U.S. Census Bureau
Census QuickFact for Onondaga County

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>A Housing Unit is a broad term for those places where people live (whether occupied or temporarily vacant), such as a house, an apartment, a mobile home, or an area that is considered as a separate living quarter. Separate living quarters (consisting of one or more rooms) are considered to be those places where people live, sleep and eat separately from others and that have access to the outside (either directly or by a shared hallway).

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<3>The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Onondaga. The value given by the Census Bureau reflects their statistical (or sampling) requirements.

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<4>All Quarter-dollar coin images from the United States Mint.

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