About the County

Jasper County was organized in 1846 and named after Sargeant William Jasper, a Revolutionary War hero. Located 35 miles east of Des Moines, it is the 18th most populous county of Iowas's 99 total counties, in the 2010 census. The county seat is Newton.


Geography Quick Fact
Jasper County
FIPS Code 99 19
Land Area (square miles)
729.99 55,869.36
Metropolitan or Micropolitan Statistical Area
Newton, IA Micro Area N/A
Persons per square mile (2010) 50.5 54.5