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The 2000 Census showed that Plaquemines Parish had a population of 26,757 people. This represented 0.6% of the total population of Louisiana, making it the state's 36th most populous parish (out of 64 parishes).

From the Census Estimates for 2009<1>, Plaquemines had a population of 20,942 people. This is a decrease of 21.73% 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
201023,042-13.88%+10.03% since 2009
200920,942-21.73%-0.93% since 2008
200821,138-21%-1.01% since 2007
200721,353-20.2%+0.28% since 2006
200621,293-20.42%-25.42% since 2005
200528,549+6.7%-0.19% since 2004
200428,602+6.9%+3.47% since 2003
200327,644+3.32%+1.94% since 2002
200227,119+1.35%+0.99% since 2001
200126,852+0.36%+0.36% since 2000
200026,757The Last Census

Plaquemines Parish had 10,481 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Plaquemines Parish has a total area<3> of 2,428 square miles [6,289 km²]. Of this total, 844 square miles [2,187 km²] of the area is land, with the balance (65.2%) being water (1,583 square miles [4,102 km²]).

Using the above population and land area values, Plaquemines Parish had a population density of 31.68 people per square mile [12.23 people/km²], making it the state's 44th 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 Plaquemines Parish is available. The QuickFact also contains a comparison between Plaquemines and the state of Louisiana.

Click here for the Plaquemines Parish QuickFact (QF-22075).

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

(2009 Est.)
(2000 Census)
Change in
JeffersonQF-22051   NW443,342455,466-2.66%
OrleansQF-22071   NW354,850484,674-26.79%
Saint BernardQF-22087   N40,65567,229-39.53%

The Gulf of Mexico lies to the south and the east.

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U.S. Census Bureau
Census QuickFact for Plaquemines 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 Plaquemines. 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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