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The 2000 Census showed that Marathon County had a population of 125,834 people. This represented 2.35% of the total population of Wisconsin, making it the state's 10th most populous county (out of 72 counties).

From the Census Estimates for 2009<1>, Marathon had a population of 131,612 people. This is an increase of 4.59% 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
2010134,063+6.54%+1.86% since 2009
2009131,612+4.59%+0.43% since 2008
2008131,043+4.14%+0.81% since 2007
2007129,993+3.31%+0.9% since 2006
2006128,834+2.38%+1.02% since 2005
2005127,532+1.35%+0.65% since 2004
2004126,710+0.7%+0.25% since 2003
2002126,299+0.37%+0.14% since 2001
2001126,127+0.23%+0.23% since 2000
2000125,834The Last Census

Marathon County had 50,360 Housing Units<2> at the time of the 2000 Census.

The 2000 Census shows that Marathon County has a total area<3> of 1,576 square miles [4,082 km²]. Of this total, 1,544 square miles [4,001 km²] of the area is land, with the balance (1.98%) being water (31.18 square miles [80.8 km²]).

Using the above population and land area values, Marathon County had a population density of 81.4 people per square mile [31.45 people/km²], making it the state's 24th most densely populated county (out of 72 counties).

US Census QuickFacts

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

Click here for the Marathon County QuickFact (QF-55073).

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

(2009 Est)
(2000 Census)
Change in
Rib MountainQF-55673257,1817,556-4.96%

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

(2009 Est.)
(2000 Census)
Change in
ClarkQF-55019   W33,42633,557-0.39%
LangladeQF-55067   NE20,00820,740-3.53%
LincolnQF-55069   N29,40429,641-0.8%
PortageQF-55097   S69,17667,1822.97%
ShawanoQF-55115   E41,16640,6641.23%
TaylorQF-55119   NW19,22219,680-2.33%
WaupacaQF-55135   SE51,66551,731-0.13%
WoodQF-55141   S73,93275,555-2.15%

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U.S. Census Bureau
Census QuickFact for Marathon 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 Marathon. 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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