Rock Hill is a city in St. Louis County, Missouri, United States. The population was 4,635 at the 2010 census. It is home to the Fairfax House on the National Register of Historic Places.
Rock Hill is located at 38°36′33″N 90°22′1″W / 38.60917°N 90.36694°W / 38.60917; -90.36694 (38.609052, -90.367046).
According to the United States Census Bureau, the city has a total area of 1.09 square miles (2.82 km), all land.
Rock Hill is bounded by cities Ladue, Brentwood, Webster Groves, Glendale and Warson Woods.
Manchester Road is four lanes and runs east–west across Rock Hill. North Rock Hill Road was connected to the South McKnight Road extension in June 1962. Voters passed a $3 million bond issue to repair roads in 2000. By 2005 the fund was nearly depleted with considerable work left to be done. Voters passed an proposition in 2011 to extend the street bond issue, allowing the city to raise an additional $3.5 million.
In October 2019, the board of aldermen voted to lower the speed limit on most streets to 20 miles per hour.
As of the census of 2010, there were 4,635 people, 2,064 households, and 1,198 families residing in the city. The population density was 4,252.3 inhabitants per square mile (1,641.8/km). There were 2,217 housing units at an average density of 2,033.9 per square mile (785.3/km). The racial makeup of the city was 70.6% White, 23.0% African American, 0.3% Native American, 2.5% Asian, 0.8% from other races, and 2.9% from two or more races. Hispanic or Latino of any race were 2.8% of the population.
There were 2,064 households of which 26.6% had children under the age of 18 living with them, 42.3% were married couples living together, 11.8% had a female householder with no husband present, 3.9% had a male householder with no wife present, and 42.0% were non-families. 33.8% of all households were made up of individuals and 9% had someone living alone who was 65 years of age or older. The average household size was 2.25 and the average family size was 2.93.
The median age in the city was 36.9 years. 20.7% of residents were under the age of 18; 7.1% were between the ages of 18 and 24; 32.9% were from 25 to 44; 26.8% were from 45 to 64; and 12.6% were 65 years of age or older. The gender makeup of the city was 49.0% male and 51.0% female.