The 2000 Census showed that Yellowstone County had a population of 129,352 people. This represented 14.34% of the total population of Montana, making it the state's most populous county (out of 56 counties).
From the Census Estimates for 2009<1>, Yellowstone had a population of 144,797 people. This is an increase of 11.94% 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 | 147,972 | +14.39% | +2.19% since 2009 |
2009 | 144,797 | +11.94% | +1.54% since 2008 |
2008 | 142,602 | +10.24% | +1.82% since 2007 |
2007 | 140,047 | +8.27% | +1.31% since 2006 |
2006 | 138,239 | +6.87% | +1.28% since 2005 |
2005 | 136,493 | +5.52% | +1.44% since 2004 |
2004 | 134,559 | +4.03% | +1.13% since 2003 |
2003 | 133,054 | +2.86% | +0.97% since 2002 |
2002 | 131,771 | +1.87% | +0.89% since 2001 |
2001 | 130,608 | +0.97% | +0.97% since 2000 |
--- | | | 2000 | 129,352 | The Last Census |
Yellowstone County had 54,563 Housing Units<2> at the time of the 2000 Census.
The 2000 Census shows that Yellowstone County has a total area<3> of 2,649 square miles [6,861 km²]. Of this total, only a minor amount of that area is covered by water (13.9 square miles [36 km²]).
Using the above population and land area values, Yellowstone County had a population density of 49.09 people per square mile [18.95 people/km²], making it the most densely populated county in Montana.
US Census QuickFacts
The Census Bureau has created documents containing demographic information that are called QuickFacts. A QuickFact that is specific to Yellowstone County is available. The QuickFact also contains a comparison between Yellowstone and the state of Montana. Click here for the Yellowstone County QuickFact (QF-30111).
Below are some of the communities that are located in Yellowstone County:
Below are the counties that adjoin and form the boundaries of Yellowstone County. A link to their specific Census QuickFact has been provided.
County | Census QuickFact | Direction | Population (2009 Est.) | Population (2000 Census) | Change in Population |
Big Horn | QF-30003 | SE | 13,015 | 12,671 | 2.71% |
Carbon | QF-30009 | SW | 9,756 | 9,552 | 2.14% |
Golden Valley | QF-30037 | NW | 1,057 | 1,042 | 1.44% |
Musselshell | QF-30065 | N | 4,600 | 4,497 | 2.29% |
Rosebud | QF-30087 | E | 9,258 | 9,383 | -1.33% |
Stillwater | QF-30095 | W | 8,786 | 8,195 | 7.21% |
Treasure | QF-30103 | NE | 612 | 861 | -28.92% |
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