Round Rock, Texas
Round Rock is a Texas city whose current Census footprint includes Travis County and Williamson County. Start with the quick read below for what gives Round Rock its character, then the practical property-tax, insurance, district, and local-record checks worth making before you rely on a monthly estimate.
Place essentials
Official Census snapshot- Census place type
- City
- July 2025 population
- 141,282
- Change from 2020 base
- +18.2%
- Land area
- 38.6 sq. mi.
- County footprint
- Travis County and Williamson County
Place type, county footprint, and land area use the Census Bureau's January 1, 2025 geography. Population uses Vintage 2025 estimates through July 1, 2025; change compares that estimate with the April 1, 2020 estimates base. Geography file | Population file
Official routes
Use the office for the parcel address; a mailing city is not always the governing city.
Local checks
- WCAD account
- MUD or PID
- School district
- County
- HOA budget
What buyers should know
Confirm whether the parcel falls in Williamson or Travis County — the line runs through the city and affects appraisal, tax rates, and some services.
School district and MUD/PID boundaries deserve a parcel-level lookup; newer subdivisions often carry bond-backed district taxes on top of the base rate.
Check the updated Brushy Creek FEMA flood maps (revised 2019) and get a foundation inspection — the area sits on blackland prairie expansive clay that moves with moisture.
Local character
Start with Round Rock itself
A few landmarks, stories, and everyday places that help give Round Rock its shape.
Local History
Old Town Round Rock Grew Around the Actual Round Rock
Round Rock's official history says Old Town grew around a low-water crossing marked by the actual round rock in Brushy Creek.
City Park
Old Settlers Park Is Round Rock's Big Sports-and-Trail Park
Old Settlers Park is Round Rock's largest park, with 645 acres, trails, sports fields, courts, open space, pavilions, and a water park.
Then zoom out to the surrounding counties
County History
How Travis County Was Founded and Named
Travis County was created on January 25, 1840 and named for William Barret Travis, the Alamo commander.
Property Tax Basics
Travis Central Appraisal District: What It Does
TCAD sets the value of your property, but a separate office collects your taxes.
County History
Williamson County Was Established in 1848 and Named for a Colorful Judge
The Texas Legislature created Williamson County on March 13, 1848, naming it for Robert M. Williamson, a judge, soldier, and early Texas leader.
Nearby places
Other local pages to compare
Pflugerville
Travis County and Williamson County
Austin / Central Texas / Hill Country
Hutto
Williamson County
Austin / Central Texas / Hill Country
Cedar Park
Travis County and Williamson County
Austin / Central Texas / Hill Country
Georgetown
Williamson County
Austin / Central Texas / Hill Country
Nearby counties
Local notes for nearby counties
Next steps for Round Rock
Compare nearby places
Put Census population, land area, county footprints, and official office routes side by side.
Open comparison ->Estimate property tax
Use the official local rates and appraisal value for this parcel.
Open estimator ->Build a buyer timeline
Track homestead, appraisal notice, protest, and tax-bill dates.
Build timeline ->Read insurance guide
Check flood, windstorm, roof, deductibles, and coverage questions.
Read guide ->