Round Rock

Round Rock is on Interstate Highway 35 in south central Williamson County, sixteen miles north of downtown Austin. It was established on the north bank of Brushy Creek where Jacob M. Harrell, formerly a blacksmith in Austin, set up his shop during the spring of 1848. The settlement was first called Brushy Creek. Thomas C. Oatts, who became the first postmaster in 1851, was asked by postal officials to submit another name, and on August 24, 1854, the town officially became Round Rock, as suggested by Oatts and Harrell, who often fished together from a large anvil-shaped limestone rock in Brushy Creek near their dwellings. The Chisholm Trail, used by early cattle drivers on their way to Kansas, passed through Round Rock, crossing Brushy Creek near the rock.

Adapted from the official Handbook of Texas, a state encyclopedia developed by the Texas State Historical Association (TSHA). It is an authoritative source of trusted historical records.

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Round Rock is part of or belongs to the following places.

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Place type

Round Rock is classified as a Town

Associated Names

  • [Old-]
  • (Andersonville)
  • (Brushy Creek 1)


  • Latitude

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Is Incorporated


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Round Rock by the Numbers

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Population Counts

Round Rock
Pop. Year Source
119,468 2020 United States Census Bureau
130,282 2019 Texas Demographic Center
99,887 2010 United States Census Bureau
61,136 2000 United States Census Bureau
30,923 1990 United States Census Bureau
11,812 1980 United States Census Bureau
2,811 1970 United States Census Bureau
1,878 1960 United States Census Bureau
1,438 1950 United States Census Bureau
1,240 1940 United States Census Bureau
1,173 1930 United States Census Bureau
900 1920 United States Census Bureau