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The Commemorative
Quarter for
The Commemorative Quarter for Maryland

The 2000 Census showed that Saint Mary's County had a population of 86,211 people. This represented 1.63% of the total population of Maryland, making it the state's 11th most populous county (out of 24 counties).

From the Census Estimates for 2009<1>, Saint Mary's had a population of 102,999 people. This is an increase of 19.47% 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
2010105,151+21.97%+2.09% since 2009
2009102,999+19.47%+1.31% since 2008
2008101,664+17.92%+1.26% since 2007
2007100,401+16.46%+1.77% since 2006
200698,653+14.43%+1.72% since 2005
200596,982+12.49%+2.13% since 2004
200494,959+10.15%+2.48% since 2003
200392,664+7.49%+3.08% since 2002
200289,897+4.28%+2.78% since 2001
200187,468+1.46%+1.46% since 2000
200086,211The Last Census

Saint Mary's County had 34,081 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Saint Mary's County has a total area<3> of 764 square miles [1,980 km²]. Of this total, 361.3 square miles [935 km²] of the area is land, with the balance (52.7%) being water (403.3 square miles [1,044 km²]).

Using the above population and land area values, Saint Mary's County had a population density of 238.6 people per square mile [92.1 people/km²], making it the state's 13th most densely populated county (out of 24 counties).

US Census QuickFacts

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

Click here for the Saint Mary's County QuickFact (QF-24037).

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

(2009 Est.)
(2000 Census)
Change in
CalvertQF-24009   N89,21274,56319.65%
CharlesQF-24017   NW142,226120,54617.98%

The Chesapeake Bay lies to the east.

Other Roadside Stops ...

About Maryland

Cities, Towns and Villages of Maryland

Off-the-Road Links ...

U.S. Census Bureau
Census QuickFact for Saint Mary's 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 Saint Mary's. 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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