The 2000 Census showed that Johnson County had a population of 48,258 people. This represented 0.86% of the total population of Missouri, making it the state's 18th most populous county (out of 115 counties).
From the Census Estimates for 2009<1>, Johnson had a population of 52,657 people. This is an increase of 9.12% 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 | 52,595 | +8.99% | -0.12% since 2009 |
2009 | 52,657 | +9.12% | +0.95% since 2008 |
2008 | 52,161 | +8.09% | +0.29% since 2007 |
2007 | 52,009 | +7.77% | +0.62% since 2006 |
2006 | 51,687 | +7.11% | +0.42% since 2005 |
2005 | 51,473 | +6.66% | +0.51% since 2004 |
2004 | 51,212 | +6.12% | +1.33% since 2003 |
2003 | 50,538 | +4.72% | +1.31% since 2002 |
2002 | 49,884 | +3.37% | +1.16% since 2001 |
2001 | 49,310 | +2.18% | +2.18% since 2000 |
--- | | | 2000 | 48,258 | The Last Census |
Johnson County had 18,886 Housing Units<2> at the time of the 2000 Census.
The 2000 Census shows that Johnson County has a total area<3> of 833 square miles [2,157 km²]. Of this total, only a minor amount of that area is covered by water (2.59 square miles [6.7 km²]).
Using the above population and land area values, Johnson County had a population density of 58.1 people per square mile [22.44 people/km²], making it the state's 26th most densely populated county (out of 115 counties).
US Census QuickFacts
The Census Bureau has created documents containing demographic information that are called QuickFacts. A QuickFact that is specific to Johnson County is available. The QuickFact also contains a comparison between Johnson and the state of Missouri. Click here for the Johnson County QuickFact (QF-29101).
Below are some of the communities that are located in Johnson County:
Community | Census QuickFact | Population (2009 Est) | Population (2000 Census) | Change in Population |
Warrensburg | QF-2977092 | 19,203 | 16,340 | 17.52% |
Below are the counties that adjoin and form the boundaries of Johnson County. A link to their specific Census QuickFact has been provided.
County | Census QuickFact | Direction | Population (2009 Est.) | Population (2000 Census) | Change in Population |
Cass | QF-29037 | W | 100,184 | 82,092 | 22.04% |
Henry | QF-29083 | S | 22,176 | 21,997 | 0.81% |
Jackson | QF-29095 | NW | 705,708 | 654,880 | 7.76% |
Lafayette | QF-29107 | N | 32,572 | 32,960 | -1.18% |
Pettis | QF-29159 | E | 41,421 | 39,403 | 5.12% |
Saline | QF-29195 | NE | 22,821 | 23,756 | -3.94% |
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