Knightsville is a town in Van Buren Township, Clay County, Indiana, United States. The population was 872 at the 2010 census. It is part of the Terre Haute Metropolitan Statistical Area. History Knightsville sprang up in 1867 around an iron furnace which had been built the year before. It was named for Dr. A. W. Knight, the original owner of the town site. The Knightsville post office was established in 1870. Geography Knightsville is located at (39.526209, -87.090828). According to the 2010 census, Knightsville has a total area of , all land. Demographics 2010 census As of the census of 2010, there were 872 people, 274 households, and 207 families living in the town. The population density was . There were 303 housing units at an average density of . The racial makeup of the town was 96.6% White, 1.3% African American, 0.2% Native American, 0.2% Asian, 0.1% Pacific Islander, and 1.6% from two or more races. Hispanic or Latino of any race were 0.7% of the population. There were 274 households, of which 34.3% had children under the age of 18 living with them, 57.7% were married couples living together, 11.7% had a female householder with no husband present, 6.2% had a male householder with no wife present, and 24.5% were non-families. 20.1% of all households were made up of individuals, and 9.5% had someone living alone who was 65 years of age or older. The average household size was 2.61 and the average family size was 2.95. The median age in the town was 41.3 years. 20.1% of residents were under the age of 18; 8.2% were between the ages of 18 and 24; 26% were from 25 to 44; 25% were from 45 to 64; and 20.6% were 65 years of age or older. The gender makeup of the town was 50.1% male and 49.9% female. 2000 census As of the census of 2000, there were 624 people, 208 households, and 164 families living in the town. The population density was . There were 232 housing units at an average density of . The racial makeup of the town was 99.04% White, 0.32% African American, 0.16% Asian, 0.16% from other races, and 0.32% from two or more races. Hispanic or Latino of any race were 0.16% of the population. There were 208 households, out of which 33.7% had children under the age of 18 living with them,