 jasper county is a county located in the us state of iowa. as of the 2010 census, the population was 36,842. the county seat is newton. the county was organized in 1846 and is named after sergeant william jasper, a revolutionary war hero. jasper county comprises the newton, ia micropolitan statistical area, which is part of the des moines-ames-west des moines, ia combined statistical area. ==geography== according to the u.s. census bureau, the county has a total area of , of which  is land and  (0.3%) is water. the north and south skunk river flow through the county. bodies of water include lake mariposa and rock creek. ===major highways===  *20px interstate 80 *20px u.s. highway 6 *20px u.s. highway 65 *20px iowa highway 14 *20px iowa highway 117 *20px iowa highway 163 *20px iowa highway 224 *[[image:iowa
1846_establishments_in_Iowa_Territory Iowa_counties Jasper_County,_Iowa Populated_places_established_in_1846