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The Commemorative
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The Commemorative Quarter for Connecticut

The 2000 Census showed that Middlesex County had a population of 155,071 people. This represented 4.55% of the total population of Connecticut, making it the state's 6th most populous county (out of 8 counties).

From the Census Estimates for 2009<1>, Middlesex had a population of 165,702 people. This is an increase of 6.86% 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.

Since 2000
Year-to-Year Change
2009165,702+6.86%+0.47% since 2008
2008164,932+6.36%+0.55% since 2007
2007164,034+5.78%+0.43% since 2006
2006163,326+5.32%+0.8% since 2005
2005162,025+4.48%+0.4% since 2004
2004161,377+4.07%+0.37% since 2003
2003160,784+3.68%+0.99% since 2002
2002159,207+2.67%+1.37% since 2001
2001157,061+1.28%+1.28% since 2000
2000155,071The Last Census

Middlesex County had 67,285 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Middlesex County has a total area<3> of 439.1 square miles [1,137 km²]. Of this total, 369.3 square miles [956 km²] of the area is land, with the balance (15.9%) being water (69.8 square miles [180.8 km²]).

Using the above population and land area values, Middlesex County had a population density of 419.9 people per square mile [162.1 people/km²], making it the state's 4th most densely populated county (out of 8 counties).

US Census QuickFacts

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

Click here for the Middlesex County QuickFact (QF-09007).

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

(2009 Est)
(2000 Census)
Change in
East HamptonQF-092249012,76613,352-4.39%
Old SaybrookQF-095732010,54510,3671.72%
East HaddamQF-09222808,9418,3337.3%

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

(2009 Est.)
(2000 Census)
Change in
HartfordQF-09003   NW879,835857,1832.64%
New HavenQF-09009   W848,006824,0082.91%
New LondonQF-09011   E266,830259,0882.99%

The Atlantic Ocean lies to the south.

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About Connecticut

Communities in Connecticut

Off-the-Road Links ...

U.S. Census Bureau
Census QuickFact for Middlesex 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 Middlesex. 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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