Oskaloosa, IA (Iowa) Houses and Residents. Total population: 11,541 (Urban population: 10,691 (all inside urban clusters), Rural population: 217 (all nonfarm)) Houses: 4,938 (4,602 occupied: 2,851 owner occupied, 2,208 renter occupied) Housing density: 720 houses/condos per square mile. Median price asked for vacant for-sale houses and condos in 2013: $35,332. Median contract rent in 2013: $357 (lower quartile is $252, upper quartile is $418) Median rent asked for vacant for-rent units in 2013: $431. Median gross rent in Oskaloosa, IA in 2013: $440. Housing units in Oskaloosa with a mortgage: 1,621 (90 second mortgage, 102 home equity loan, 7 both second mortgage and home equity loan) Houses without a mortgage: 1,071. Median household income for houses/condos with a mortgage: $61,217.