Jasper County, Iowa

Jasper County, Iowa
Location within the U.S. state of Iowa
Coordinates: 41°41′17″N 93°03′41″W / 41.688055555556°N 93.061388888889°W / 41.688055555556; -93.061388888889
Country United States
State Iowa
Founded1846
Named afterWilliam Jasper
SeatNewton
Largest cityNewton
Area
 • Total
733 sq mi (1,900 km2)
 • Land730 sq mi (1,900 km2)
 • Water2.5 sq mi (6.5 km2)  0.3%
Population
 (2020)
 • Total
37,813
 • Estimate 
(2024)
38,107
 • Density52/sq mi (20/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district1st
Websitejasperia.org
  • Iowa county number 50

Jasper County is a county in the U.S. state of Iowa. As of the 2020 census, the population was 37,813. The county seat is Newton. The county was organized in 1846 and is named after Sergeant William Jasper, a Revolutionary War hero.

Jasper County is part of the Des MoinesWest Des Moines, IA Metropolitan Statistical Area.