Missouri has one hundred and fourteen counties and one independent city. St. Louis City is separate from St. Louis
County and is referred to as a "city not within a county." Following the Louisiana Purchase and the admittance of Louisiana into the United States in 1812, five counties were formed out of the Missouri Territory at the first general assembly. Most subsequent counties were apportioned from these five original counties.
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Polk County is a county located in the southwestern portion of the state of Missouri. Based on the 2010 census, the population was
31,137. Its county seat is Bolivar. The county was founded January 5, 1835, and named for Ezekiel Polk.
Polk County is part of the Springfield, MO Metropolitan Statistical Area.
Polk County was organized on March 14, 1835, by a supplemental act to correct an error in the boundaries of the act
of January 5, 1835. An influential man, John P. Campbell, who was a second cousin to Congressman James K. Polk, later
President Polk, and his suggestion was adopted. (Eaton (28), p. 342; Session Acts 1834-1835)
Source: Meyers, Robert Lee. "Place Names In The Southwest Counties Of Missouri." M.A. thesis., University of
Geography: Land and Water
As reported by the Census Bureau, the county has a total area of 642 square miles (1,660 km2), of which 636 square miles (1,650 km2) is
land and 6.9 square miles (18 km2) (1.1%) is water.