As of the census of 2000, there were 11,626 people, 4,733 households, and 3,474 families residing in the city. The population density was 647.9 people per square mile (250.1/km²). There were 4,959 housing units at an average density of 276.3/sq mi (106.7/km²). The racial makeup of the city was 97.19% White, 1.48% Black or African American, 0.17% Native American, 0.53% Asian, 0.02% Pacific Islander, 0.14% from other races, and 0.47% from two or more races. 0.65% of the population were Hispanic or Latino of any race.
There were 4,733 households out of which 28.8% had children under the age of 18 living with them, 61.3% were married couples living together, 9.6% had a female householder with no husband present, and 26.6% were non-families. 24.6% of all households were made up of individuals and 11.7% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 2.88.
The median income for a household in the city was $45,786, and the median income for a family was $56,929. Males had a median income of $36,714 versus $29,039 for females. The per capita income for the city was $22,673. About 3.5% of families and 5.1% of the population were below the poverty line, including 7.0% of those under age 18 and 7.3% of those age 65 or over.