 The population density was 99.0/sqmi (38.2/km²).There were 15,533 housing units at an average density of 37 per square mile (14/km²).The racial makeup of the county was 97.21% White, 0.51% Black or African American, 0.45% Native American, 0.70% Asian, 0.03% Pacific Islander, 0.31% from other races, and 0.80% from two or more races.