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Missouri Counties
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Missouri Counties

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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Audrain County, Missouri

Audrain County Education, Geography, and HistoryAudrain County, Missouri Courthouse

Audrain County is a county located in the central part of the state of Missouri. As of the 2010 US Census, the population was 25,529. Its county seat is Mexico. The county was organized December 13, 1836, and named for Colonel James Hunter Audrain of the War of 1812 and whom later was elected to the state legislature.

Audrain County comprises the Mexico, MO Micropolitan Statistical Area, which is included in the Columbia-Moberly-Mexico, MO Combined Statistical Area.

Etymology - Origin of Audrain County Name

Named for James H. Audrain, Missouri legislator.


County QuickFacts: Census Bureau Quick Facts

History of Audrain County

Originally a part of St. Charles County and later of Pike County. Bounded on the north by Monroe and Ralls Counties; on the east by Pike and Montgomery; on the south by Montgomery, Callaway, and Boone; and on the west by Boone and Randolph. The boundaries were designated by an act of the state legislature on January 12, 1831, the county to be organized as soon as the population was such as to justify an organization and to be named Audrain for James H. Audrain, pioneer of St. Charles County and member of the state legislature of the Eighth District (Lincoln and St. Charles Counties) from 1830 until his death on November 10, 1831. The county was organized on December 17, 1836. (HIST. AUDRAIN, 95-6, State Laws, First Session of Sixth General Assembly, 1830-1831, 20, State Laws First Session of Ninth General Assembly, 1836- 1837, 44-45; Nesbit Livingston, William Vivion)

Source: Leech, Esther. "Place Names Of Six East Central Counties Of Missouri." M.A. thesis., University of Missouri-Columbia, 1933.

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 697 square miles (1,810 km2), of which 692 square miles (1,790 km2) is land and 4.6 square miles (12 km2) (0.7%) is water.

Neighboring Counties

Bordering counties are as follows:

  • Monroe County (north)
  • Ralls County (northeast)
  • Pike County (east)
  • Montgomery County (southeast)
  • Callaway County (south)
  • Boone County (southwest)
  • Randolph County (northwest)


Public schools

Community R-VI School District - Laddonia
Mexico School District No. 200 - Mexico
Van-Far R-I School District - Vandalia

Private schools

Sunnydale Seventh-day Adventist Elementary School - Centralia (02-09) - Seventh-day Adventist
St. Brendan School - Mexico (PK-08) - Roman Catholic
St. Joseph Elementary School - Martinsburg (K-09) - Roman Catholic
Missouri Military Academy - Mexico (06-12) - Military (Boys)

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