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Jefferson County, Missouri

Jefferson County is a county located in east central Missouri in the United States. The county was included as the mean center of U.S. population in 1980. It is the sixth most-populous county in Missouri. As of the 2010 U.S. Census, the county's population was 218,733. Its county seat is Hillsboro. The county was organized in 1818 and named in honor of former President Thomas Jefferson.

Jefferson County is part of the St. Louis Metro Area and consists of many of the city's southern suburbs.

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Maps for Jefferson County

The following maps are available for Jefferson County:

Jefferson County:

  • Aerial Photos
  • Aquatic
  • LiDAR
  • Cities
  • County
  • Floodplain
  • Property Boundaries
  • Subdivisions
  • Transportation
  • Upcoming Petitions
  • Zoning

Maps for Lake Tishomingo

Wastewater System (requires login)

Other Data for Jefferson County

County: Jefferson

County Seat: Hillsboro

Populations (2010 Census)

  • Jefferson County - 218,733
  • Arnold - 20,808
  • Byrnes Mill - 2,781
  • Cedar Hill Lakes - 237
  • Crystal City - 4,855
  • De Soto - 6,400
  • Festus - 11,602
  • Herculaneum - 3,468
  • Hillsboro - 2,821
  • Kimmswick - 157
  • Olympian Village - 774
  • Parkdale - 170
  • Pevely - 5,484
  • Scotsdale - 222