Round Rock Flag

Round Rock

County Seat:
No
Area (mi²):
38.616
State:
Texas

Round Rock is a city located in Williamson County, Texas. Round Rock has a 2026 population of 135,359. Round Rock is currently growing at a rate of 3.08% annually and its population has increased by 12.26% since the most recent census, which recorded a population of 120,572 in 2020.

135.4K
Total Population
3,505
Density (mi²)
4K 3.08%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)