Oak Hill is a village in Jackson County, Ohio, United States. The population was 1,685 at the 2000 census.
Oak Hill is located at 38°53′47″N, 82°34′14″W (38.896514, -82.570649)GR1. According to the United States Census Bureau, the village has a total area of 3.0 km² (1.1 mi²), all land. As of the censusGR2 of 2000, there were 1,685 people, 673 households, and 458 families residing in the village. The population density was 570.7/km² (1,474.5/mi²). There were 739 housing units at an average density of 250.3/km² (646.7/mi²). The racial makeup of the village was 98.28% White, 0.24% African American, 0.42% Native American, 0.24% Asian, 0.12% from other races, and 0.71% from two or more races. Hispanic or Latino of any race were 0.12% of the population. There were 673 households out of which 34.3% had children under the age of 18 living with them, 49.2% were married couples living together, 14.6% had a female householder with no husband present, and 31.8% were non-families. 27.8% of all households were made up of individuals and 13.7% had someone living alone who was 65 years of age or older. The average household size was 2.44 and the average family size was 2.95.
In the village the population was spread out with 25.3% under the age of 18, 8.7% from 18 to 24, 29.6% from 25 to 44, 19.8% from 45 to 64, and 16.6% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 82.0 males. For every 100 females age 18 and over, there were 78.4 males.
The median income for a household in the village was $28,289, and the median income for a family was $31,898. Males had a median income of $28,750 versus $20,438 for females. The per capita income for the village was $13,580. About 14.2% of families and 20.6% of the population were below the poverty line, including 29.4% of those under age 18 and 24.7% of those age 65 or over.
Lake Jackson is a man-made lake near the city limits of Oak Hill. It is the home of the Jefferson Furnace, which was used to make pig iron for the iron-clad ship,the USS Monitor, during the Civil War. The Jefferson Furnace is available today for sightseers. The furnace is located at the edge of the lake on State Route 279. Lake Jackson is also an Ohio State Park.