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

The community of New Brunswick is the Seat for Middlesex County.

Middlesex County is one of the original counties of New Jersey and was founded in 1683.

From the Census Estimates for 2009, <1> Middlesex had a population of 790,738 people. This is an increase of 5.41% since the last Census (which gave a population of 750,162 people in 2000).

At the time of the 2000 Census, Middlesex represented 8.92% of the total population of New Jersey, making it the state's 3rd most populous county (out of 21 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
2010809,858+7.96%+2.42% since 2009
2009790,738+5.41%+0.69% since 2008
2008785,324+4.69%+0.7% since 2007
2000750,162The Last Census

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


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

Community 2009
(2009vs. 2000)
New Brunswick   51,57948,5736.19% increase  
Perth Amboy   48,71147,3032.98% increase  
South Amboy   7,7687,9131.83% decrease  

Websites for Middlesex County

Official Website:   www.co.middlesex.nj.us/

If you know of a history or genealogy society whose interest includes Middlesex 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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About New Jersey

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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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