 There were 16,251 housing units at an average density of 22.9/sqmi (8.82/km²).The racial makeup of the county was 94.7% White, 0.6% Black or African American, 0.2% Native American, 1.5% Asian, <0.1% Pacific Islander, 2.2% from other races, and 0.9% from two or more races.4.3% of the population were Hispanic or Latino of any race.