2020 census
As of the 2020 census, Oak Hill had a population of 4,891. The median age was 44.0 years. 24.5% of residents were under the age of 18 and 21.2% of residents were 65 years of age or older. For every 100 females there were 96.7 males, and for every 100 females age 18 and over there were 92.9 males age 18 and over. [11]
72.6% of residents lived in urban areas, while 27.4% lived in rural areas. [12]
There were 1,764 households in Oak Hill, of which 37.6% had children under the age of 18 living in them. Of all households, 73.1% were married-couple households, 8.6% were households with a male householder and no spouse or partner present, and 15.5% were households with a female householder and no spouse or partner present. About 15.2% of all households were made up of individuals and 9.0% had someone living alone who was 65 years of age or older. [11]
There were 1,874 housing units, of which 5.9% were vacant. The homeowner vacancy rate was 0.6% and the rental vacancy rate was 7.7%. [11]
2000 census
As of the 2000 census [5] , there was a population of 4,493, with 1,816 households and 1,367 families residing in the city. The population density was 570.4 inhabitants per square mile (220.2/km2). There were 1,894 housing units at an average density of 240.5 per square mile (92.9/km2). The racial makeup of the city was 96.26% White, 0.98% African American, 0.11% Native American, 1.65% Asian, 0.02% Pacific Islander, 0.27% from other races, and 0.71% from two or more races. Hispanic or Latino of any race were 0.76% of the population.
There were 1,816 households, out of which 30.8% had children under the age of 18 living with them, 68.3% were married couples living together, 5.6% had a female householder with no husband present, and 24.7% were non-families. 20.6% of all households were made up of individuals, and 10.6% had someone living alone who was 65 years of age or older. The average household size was 2.47 and the average family size was 2.88.
In the city, the population was spread out, with 22.7% under the age of 18, 4.0% from 18 to 24, 23.2% from 25 to 44, 32.0% from 45 to 64, and 18.2% who were 65 years of age or older. The median age was 45 years. For every 100 females, there were 95.3 males. For every 100 females age 18 and over, there were 92.0 males.
The median income for a household in the city was $90,174, and the median income for a family was $104,952. Males had a median income of $70,963 versus $42,500 for females. The per capita income for the city was $58,932, the fourth highest in the state. None of the families and 1.2% of the population were living below the poverty line, including no under eighteens and 1.8% of those over 64.
