2000 census
As of the census of 2000, there were 11,783 people, 4,553 households, and 3,496 families residing in the city. The population density was 541.3 people per square mile (209.0/km²). There were 4,761 housing units at an average density of 218.7 per square mile (84.4/km²). The racial makeup of the city was 97.22% White, 0.35% Black or African American, 0.08% Native American, 1.07% Asian, 0.01% Pacific Islander, 0.44% from other races, and 0.84% from two or more races. Some 1.30% of the population were Hispanic or Latino of any race.
Approximately 31.5% of households had children under the age of 18 living with them, 69.2% were living together, 5.2% had a female householder with no husband present, and 23.2% were non-families. About 17.4% of all households were made up of individuals and 4.4% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 2.93.
In the city, the population was spread out with 23.1% under the age of 18, 5.8% from 18 to 24, 29.6% from 25 to 44, 30.8% from 45 to 64, and 10.8% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 99.5 males. For every 100 females age 18 and over, there were 98.2 males.
The median income for a household in the city was $75,589, and the median income for a family was $80,163. Males had a median income of $55,810 versus $35,320 for females. The per capita income for the city was $34,851. About 0.6% of families and 1.3% of the population were below the poverty line, including 1.0% of those under age 18 and 2.3% of those age 65 or over.
2010 census
As of the census of 2010, there were 13,195 people, 5,410 households, and 3,883 families residing in the city. The population density was 676.7 inhabitants per square mile (261.3/km2). There were 5,767 housing units at an average density of 295.7 per square mile (114.2/km2). The racial makeup of the city was 94.3% White, 1.1% African American, 0.3% Native American, 2.6% Asian, 0.5% from other races, and 1.2% from two or more races. Hispanic or Latino of any race were 2.1% of the population.
There were 5,410 households of which 28.3% had children under the age of 18 living with them, 63.7% were married couples living together, 5.6% had a female householder with no husband present, 2.5% had a male householder with no wife present, and 28.2% were non-families. 23.2% of all households were made up of individuals and 8.3% 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 2.87.
The median age in the city was 45.3 years. 21.5% of residents were under the age of 18; 4.9% were between the ages of 18 and 24; 23% were from 25 to 44; 34.2% were from 45 to 64; and 16.3% were 65 years of age or older. The gender makeup of the city was 48.6% male and 51.4% female.
Historical population |
||
Census |
Pop. |
%± |
| 1880 | 566 | — |
| 1890 | 680 | 20.1% |
| 1900 | 714 | 5.0% |
| 1910 | 749 | 4.9% |
| 1920 | 800 | 6.8% |
| 1930 | 1,067 | 33.4% |
| 1940 | 1,352 | 26.7% |
| 1950 | 1,792 | 32.5% |
| 1960 | 2,484 | 38.6% |
| 1970 | 3,271 | 31.7% |
| 1980 | 4,637 | 41.8% |
| 1990 | 4,941 | 6.6% |
| 2000 | 11,783 | 138.5% |
| 2010 | 13,195 | 12.0% |
| Est. 2015 | 14,138 | 7.1% |