As of the census of 2000, there were 12,949 people, 6,005 households, and 5,486 families residing in the city. The population density was 1,726.8 people per square mile (666.2/km²). The racial makeup of the city was 98.40% White, 0.20% African American, 0.23% Native American, 0.31% Asian, 0.01% Pacific Islander, 0.12% from other races, and 0.80% from two or more races. Hispanic or Latino of any race were 0.77% of the population.
In the city the population was spread out with 22.3% under the age of 18, 8.8% from 18 to 24, 26.0% from 25 to 44, 22.1% from 45 to 64, and 20.8% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 86.8 males. For every 100 females age 18 and over, there were 83.4 males.
The median income for a household in the city was $25,358, and the median income for a family was $34,432. Males had a median income of $32,621 versus $18,765 for females. The per capita income for the city was $14,671. About 13.9% of families and 18.6% of the population were below the poverty line, including 27.0% of those under age 18 and 10.7% of those age 65 or over.