Jasper County, Missouri

Jasper County
Jasper County Courthouse in Carthage (August 2008)
Location within the U.S. state of Missouri
Missouri's location within the U.S.
Coordinates: 37°12′N 94°20′W / 37.2°N 94.34°W / 37.2; -94.34
Country United States
State Missouri
FoundedJanuary 2, 1841
Named afterWilliam Jasper
SeatCarthage
Largest cityJoplin
Area
  Total
641 sq mi (1,660 km2)
  Land638 sq mi (1,650 km2)
  Water2.8 sq mi (7 km2)  0.4%
Population
 (2020)
  Total
122,761
  Estimate 
(2022)
124,075
  Density190/sq mi (74/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district7th
Websitewww.jaspercountymo.gov

Jasper County is located in the southwest portion of the U.S. state of Missouri. As of the 2020 census, the population was 122,761. Its county seat is Carthage, and its largest city is Joplin. The county was organized in 1841 and named for William Jasper, a hero of the American Revolutionary War. Jasper County is included in the Joplin Metropolitan Statistical Area. The Jasper County Sheriff's Office has legal jurisdiction throughout the county.