2010 census

As of the census of 2010, 7,345 people, 2,435 households, and 2,055 families lived in the city. The population density was 917.0 inhabitants per square mile (354.1/km²). There were 2,545 housing units at an average density of 317.7 per square mile (122.7/km²). The racial makeup of the city was 95.6% White, 0.5% African American, 0.1% Native American, 2.0% Asian, 0.3% from other races, and 1.5% from two or more races. Hispanic or Latino of any race were 2.0% of the population.

There were 2,435 households, of which 49.4% had children under the age of 18 living with them, 76.7% were married couples living together, 5.4% had a female householder with no husband present, 2.3% had a male householder with no wife present, and 15.6% were non-families. 12.6% of all households were made up of individuals, and 4.3% had someone living alone who was 65 years of age or older. The average household size was 2.99 and the average family size was 3.27.

The median age in the city was 38.9 years. 32.9% of residents were under the age of 18; 4.5% were between the ages of 18 and 24; 25.5% were from 25 to 44; 28.6% were from 45 to 64; and 8.5% were 65 years of age or older. The gender makeup of the city was 49.7% male and 50.3% female.

2000 census

As of the census of 2000, there were 4,025 people, 1,367 households, and 1,141 families living in the city. The population density was 575.4 inhabitants per square mile (222.2/km²). There were 1,410 housing units at an average density of 201.6 per square mile (77.8/km²). The racial makeup of the city was 97.91% White, 0.27% African American, 0.12% Native American, 0.84% Asian, 0.37% from other races, and 0.47% from two or more races. Hispanic or Latino of any race were 0.99% of the population.

There were 1,367 households, out of which 47.0% had children under the age of 18 living with them, 76.0% were married couples living together, 5.3% had a female householder with no husband present, and 16.5% were non-families. 11.3% of all households were made up of individuals, and 3.4% had someone living alone who was 65 years of age or older. The average household size was 2.90 and the average family size was 3.17.

In the city, the population was spread out, with 31.7% under the age of 18, 4.2% from 18 to 24, 33.5% from 25 to 44, 24.0% from 45 to 64, and 6.6% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 99.4 males. For every 100 females age 18 and over, there were 97.8 males.

The median income for a household in the city was $86,772, and the median income for a family was $91,681. Males had a median income of $60,931 versus $34,519 for females. The per capita income for the city was $38,929. About 1.3% of families and 2.3% of the population were below the poverty line, including 2.1% of those under age 18 and 2.2% of those age 65 or over.