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Boone County Offices will be closed to the public starting March 19th, 2020.  Offices will be staffed, but the public is encouraged to call the office before attempting to visit.

Boone County, Iowa, Population (1850- 2012)

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Historical population (Boone County, Iowa)
Census Pop.
1850 735
1860 4,232 475.8%
1870 14,584 244.6%
1880 20,838 42.9%
1890 23,772 14.1%
1900 28,200 18.6%
1910 27,626 -2.0%
1920 29,892 8.2%
1930 29,271 -2.1%
1940 29,782 1.7%
1950 28,139 -5.5%
1960 28,037 -0.4%
1970 26,470 -5.6%
1980 26,184 -1.1%
1990 25,186 -3.8%
2000 26,224 4.1%
2010 26,306 0.3%
Est. 2013 26,364 0.2%