2020 census As of the
2020 census, Oconomowoc had a population of 18,203. The median age was 41.9 years. 23.3% of residents were under the age of 18 and 19.4% of residents were 65 years of age or older. For every 100 females there were 93.5 males, and for every 100 females age 18 and over there were 90.2 males age 18 and over. There were 7,584 households in Oconomowoc, of which 29.5% had children under the age of 18 living in them. Of all households, 52.1% were married-couple households, 15.8% were households with a male householder and no spouse or partner present, and 26.5% were households with a female householder and no spouse or partner present. About 29.8% of all households were made up of individuals and 14.0% had someone living alone who was 65 years of age or older. there were 15,759 people, 6,256 households, and 4,270 families living in the city. The
population density was . There were 6,662 housing units at an average density of . The racial makeup of the city was 96.0%
White, 0.5%
African American, 0.2%
Native American, 1.0%
Asian, 1.1% from other races, and 1.2% from two or more races.
Hispanic or Latino of any race were 3.5% of the population. There were 6,256 households, of which 34.8% had children under the age of 18 living with them, 56.7% were
married couples living together, 8.1% had a female householder with no husband present, 3.5% had a male householder with no wife present, and 31.7% were non-families. Of all households, 27.0% were made up of individuals, and 11.4% had someone living alone who was 65 years of age or older. The average household size was 2.48 and the average family size was 3.04. The median age in the city was 38.6 years. 26.3% of residents were under the age of 18; 5.4% were between the ages of 18 and 24; 28% were from 25 to 44; 25.5% were from 45 to 64; and 14.7% were 65 years of age or older. The gender makeup of the city was 47.7% male and 52.3% female.
2000 census As of the
2000 census, there were 12,382 people, 4,968 households, and 3,293 families living in the city. The population density was 1,845.5 people per square mile (712.5/km2). There were 5,239 housing units at an average density of 780.9 per square mile (301.5/km2). The racial makeup of the city was 97.71% White, 0.31% Black or African American, 0.28% Native American, 0.53% Asian, 0.01%
Pacific Islander, 0.47% from other races, and 0.69% from two or more races. About 1.65% of the population were Hispanic or Latino of any race. Approximately 30.7% of households had children under the age of 18 living with them, 54.7% were married couples living together, 8.3% had a female householder with no husband present, and 33.7% were non-families. Some 28.6% of all households were made up of individuals, and 13.5% had someone living alone who was 65 years of age or older. The average household size was 2.40 and the average family size was 2.98. In the city, the population was spread out, with 24.7% under the age of 18, 7.2% from 18 to 24, 29.5% from 25 to 44, 21.7% from 45 to 64, and 16.9% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 89.8 males. For every 100 females age 18 and over, there were 86.5 males. The median income for a household in the city was $71,162, and the median income for a family was $89,233. Males had a median earnings of $60,998 versus $41,389 for females. The
per capita income for the city was $33,418. About 1.0% of families and 2.7% of the population were below the
poverty line, including 1.8% of those under age 18 and 4.9% of those age 65 or over. ==Education==