Rockport, Indiana  Rockport is a city in Ohio Township, Spencer County, Indiana, along the Ohio River. The population was 2,270 at the 2010 census. Once the largest community in Spencer County, the city has recently been surpassed by the town of Santa Claus. The city is the county seat of Spencer County. At 37°53'1" north, Rockport is also the southernmost city in the state, located slightly south of Evansville, Cannelton, or Mount Vernon (the westernmost city). Lots were first sold in Rockport in 1818. The town received its name from rock outcroppings on the Ohio River. Three locations in Rockport are listed on the National Register of Historic Places: the Spencer County Courthouse, the Mathias Sharp House, and the Lincoln Pioneer Village. The Rockport post office has been in operation since 1823. The AK Steel facility in Rockport is reported by the EPA as the source for 70% of the pollution in the Ohio River, the nation's most polluted waterway. Rockport is located at . According to the 2010 census, Rockport has a total area of , of which (or 97.88%) is land and (or 2.12%) is water. Rockport is nestled on the Ohio River across from Owensboro, Kentucky. It is connected to Owensboro by the William H. Natcher Bridge via U.S. Route 231. As of the census of 2010, there were 2,270 people, 908 households, and 564 families living in the city. The population density was . There were 1,026 housing units at an average density of . The racial makeup of the city was 95.9% White, 1.8% African American, 0.2% Native American, 0.3% Asian, 0.4% from other races, and 1.4% from two or more races. Hispanic or Latino of any race were 2.6% of the population. There were 908 households of which 33.0% had children under the age of 18 living with them, 43.1% were married couples living together, 14.6% had a female householder with no husband present, 4.4% had a male householder with no wife present, and 37.9% were non-families. 33.8% of all households were made up of individuals and 14.9% had someone living alone who was 65 years of age or older. The average household size was 2.37 and the average family size was 3.05.