Rockwall is a city in Rockwall County, Texas, United States, which is part of the Dallas/Fort Worth Metroplex. It is the county seat of Rockwall County. The population was 37,490 at the 2010 census. The name Rockwall is derived from a naturally jointed geological formation, which has the appearance of an artificial wall.
In 1851, as the first Anglo-American settlers moved to the area, they started to dig wells. During the digging, they found large underground rock walls that were initially believed to be manmade. Later study of the wall-like features by geologists and archaeologists found them to be jointed, natural sandstone dikes that had intruded Cretaceous marl.
The town was established April 17, 1854 and named after these natural rock walls. While originally part of Kaufman County, in 1873, Rockwall County was formed with Rockwall being the county seat.
According to the United States Census Bureau, the city has a total area of 31.6 square miles (82 km²), of which, 22.3 square miles (58 km²) of it is land and 0.4 square miles (1.0 km²) of it (1.63%) is water.
Rockwall is on the east shore of Lake Ray Hubbard about 20 miles northeast of Dallas. It is on state highways 205 and 66, north of Interstate 30.
As of the census of 2000, there were 17,976 people, 6,605 households, and 5,158 families residing in the city. The population density was 806.9 people per square mile (311.5/km²). There were 7,089 housing units at an average density of 318.2 per square mile (122.8/km²). The racial makeup of the city was 91.35% White, 3.00% African American, 0.38% Native American, 1.39% Asian, 0.03% Pacific Islander, 2.57% from other races, and 1.28% from two or more races. Hispanic or Latino of any race were 6.44% of the population.
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