Rockwall County, Texas

Rockwall County, Texas
County
The Rockwall County Courthouse in Rockwall
Seal
Location within the U.S. state of Texas
Coordinates: 32.899886°N 96.41205°W / 32.899886; -96.41205
Country	United States
State	Texas
Founded	March 1, 1873
Named for	Rockwall, Texas, named in turn for its clastic dikes
Seat	Rockwall
Largest city	Rockwall
Government
• County judge	Frank New
Area
• Total	148.933 sq mi (385.73 km2)
• Land	127.210 sq mi (329.47 km2)
• Water	21.723 sq mi (56.26 km2)  14.59%
Population  (2020)
• Total	107,819
• Estimate  (2025)	140,738
• Density	1,077.44/sq mi (416.00/km2)
Demonym	Rockwallian
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	4th
Website	www.rockwallcountytexas.com

Rockwall County is a county in the U.S. state of Texas. As of the 2020 census, its population was 107,819; it was estimated to be 140,738 in 2025. Its county seat is Rockwall and both the county and city are named for a wall-like subterranean rock formation that runs throughout the county. Rockwall County is part of the Dallas–Fort Worth–Arlington metropolitan statistical area. It was one of the 25 fastest-growing counties in the U.S. in 2009. Rockwall County is listed as the wealthiest county in Texas and the 17th-wealthiest in the United States by median household income. Cities in Rockwall County include Rockwall, Heath, Royse City, Fate, McClendon-Chisholm, Mobile City, and part of Rowlett.