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The Commemorative
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The Commemorative Quarter for Louisiana

The 2000 Census showed that Saint Mary Parish had a population of 53,500 people. This represented 1.2% of the total population of Louisiana, making it the state's 21st most populous parish (out of 64 parishes).

From the Census Estimates for 2009<1>, Saint Mary had a population of 50,815 people. This is a decrease of 5.02% 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
201054,650+2.15%+7.55% since 2009
200950,815-5.02%-0.37% since 2008
200851,005-4.66%-0.31% since 2007
200751,163-4.37%-0.79% since 2006
200651,569-3.61%+1.37% since 2005
200550,871-4.91%-1.3% since 2004
200451,541-3.66%-0.69% since 2003
200351,898-2.99%-0.56% since 2002
200252,189-2.45%-0.65% since 2001
200152,528-1.82%-1.82% since 2000
200053,500The Last Census

Saint Mary Parish had 21,650 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Saint Mary Parish has a total area<3> of 1,118 square miles [2,897 km²]. Of this total, 612 square miles [1,587 km²] of the area is land, with the balance (45.23%) being water (506 square miles [1,310 km²]).

Using the above population and land area values, Saint Mary Parish had a population density of 87.3 people per square mile [33.71 people/km²], making it the state's 22nd most densely populated county (out of 64 parishes).

US Census QuickFacts

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

Click here for the Saint Mary Parish QuickFact (QF-22101).

Below are some of the communities that are located in Saint Mary Parish:

(2009 Est)
(2000 Census)
Change in
Morgan CityQF-225204011,43412,703-9.99%

Below are the parishes that adjoin and form the boundaries of Saint Mary Parish. A link to their specific Census QuickFact has been provided.

(2009 Est.)
(2000 Census)
Change in
IberiaQF-22045   NW75,10173,2662.5%
Saint MartinQF-22099   NW52,21748,5837.48%
TerrebonneQF-22109   E109,291104,5034.58%

The Gulf of Mexico lies to the south.

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U.S. Census Bureau
Census QuickFact for Saint Mary Parish

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. 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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