 The population density was 1,666.7 people per square mile (643.3/km²).There were 5,818 housing units at an average density of 776.0 per square mile (299.5/km²).The racial makeup of the city was 97.50% White, 0.34% African American, 0.45% Native American, 0.33% Asian, 0.03% Pacific Islander, 0.30% from other races, and 1.05% from two or more races.