Lewisville is a town in Franklin Township, Henry County, Indiana, United States. The population was 366 at the 2010 census. History Lewisville was platted in 1829, and named for Lewis C. Freeman one of its founders and afterward first postmaster. A post office has been in operation in Lewisville since 1831. In 1833 (when there was considerable inconsistency in the spelling of Indiana place names), it was described as follows: 'Louisville, a village in Henry county, on the National Road [U.S. 40], on the east bank of Flatrock, about ten miles south of Newcastle. It contains a small population, and one store; but has a prospect of rapid increase.' By 1909, it had a population of 503, more than 2 dozen businesses, two doctors, a newspaper, and a railway station. Guyer Opera House was added to the National Register of Historic Places in 1979. Geography Lewisville is located at (39.807221, -85.351549), along the Flatrock River. According to the 2010 census, Lewisville has a total area of , all land. Demographics 2010 census As of the census of 2010, there were 366 people, 145 households, and 104 families living in the town. The population density was . There were 164 housing units at an average density of . The racial makeup of the town was 99.5% White and 0.5% from two or more races. Hispanic or Latino of any race were 1.4% of the population. There were 145 households, of which 29.0% had children under the age of 18 living with them, 56.6% were married couples living together, 11.7% had a female householder with no husband present, 3.4% had a male householder with no wife present, and 28.3% were non-families. 25.5% of all households were made up of individuals, and 13.8% had someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 2.95. The median age in the town was 42.4 years. 20.5% of residents were under the age of 18; 9.5% were between the ages of 18 and 24; 24.3% were from 25 to 44; 27.8% were from 45 to 64; and 17.8% were 65 years of age or older. The gender makeup of the town was 46.7% male and 53.3% female. 2000 census As of the census of 2000, there were 395 people, 151 households, and 117 families living in the town. The population density was