The 2000 Census showed that Jefferson County had a population of 10,049 people. This represented 1.11% of the total population of Montana, making it the state's 19th most populous county (out of 56 counties).
From the Census Estimates for 2009<1>, Jefferson had a population of 11,470 people. This is an increase of 14.14% 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.
Year | Population | Change Since 2000 | Year-to-Year Change |
2010 | 11,406 | +13.5% | -0.56% since 2009 |
2009 | 11,470 | +14.14% | +1.61% since 2008 |
2008 | 11,288 | +12.33% | +1.45% since 2007 |
2007 | 11,127 | +10.73% | +2.38% since 2006 |
2006 | 10,868 | +8.15% | +0.91% since 2005 |
2005 | 10,770 | +7.17% | +1.93% since 2004 |
2004 | 10,566 | +5.14% | +2.51% since 2003 |
2003 | 10,307 | +2.57% | +0.82% since 2002 |
2002 | 10,223 | +1.73% | +1.03% since 2001 |
2001 | 10,119 | +0.7% | +0.7% since 2000 |
--- | | | 2000 | 10,049 | The Last Census |
Jefferson County had 4,199 Housing Units<2> at the time of the 2000 Census.
The 2000 Census shows that Jefferson County has a total area<3> of 1,658 square miles [4,296 km²]. Of this total, only a minor amount of that area is covered by water (2.19 square miles [5.68 km²]).
Using the above population and land area values, Jefferson County had a population density of 6.07 people per square mile [2.34 people/km²], making it the state's 11th most densely populated county (out of 56 counties).
US Census QuickFacts
The Census Bureau has created documents containing demographic information that are called QuickFacts. A QuickFact that is specific to Jefferson County is available. The QuickFact also contains a comparison between Jefferson and the state of Montana. Click here for the Jefferson County QuickFact (QF-30043).
Below are the counties that adjoin and form the boundaries of Jefferson County. A link to their specific Census QuickFact has been provided.
County | Census QuickFact | Direction | Population (2009 Est.) | Population (2000 Census) | Change in Population |
Broadwater | QF-30007 | NE | 4,793 | 4,385 | 9.3% |
Deer Lodge | QF-30023 | W | 8,792 | 9,417 | -6.64% |
Gallatin | QF-30031 | SE | 90,343 | 67,831 | 33.19% |
Lewis and Clark | QF-30049 | N | 61,942 | 55,716 | 11.17% |
Madison | QF-30057 | S | 7,457 | 6,851 | 8.85% |
Powell | QF-30077 | NW | 7,089 | 7,180 | -1.27% |
Silver Bow | QF-30093 | SW | 32,949 | 34,606 | -4.79% |
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