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Round Rock, TX

City in Williamson County, Texas. ZIP codes: 78664, 78665, 78681.

Population

127,786

Land area

38.1sq mi

People per sq mi

3,351

ZIP codes

3

Round Rock and its ZIP codes

Full map

Round Rock at a glance

  • Round Rock is about 29 times as dense as Texas as a whole.
  • By population, it ranks 29th among 1,795 cities and towns in Texas.
  • The median household income is $99,287, 27% above the Texas median of $78,476.
  • A typical owner-occupied home is valued at $418,600 (47% above Texas) and median rent is $1,763 a month.

Local data for Round Rock, TX

Counts from official public data

Housing and community stats

Round Rock, TX, American Community Survey 2020-2024

Full profile

Median household income

$99,287

Poverty rate

7.8%

Median home value

$418,600

Median rent

$1,763/mo

Homeownership

55.5%

Bachelor's or higher

44.8%

Median age

36.2

Average commute

24.9 min

Largest reported origins and ancestries: Mexican Americans (28,713), German Americans (16,705), Irish Americans (8,991).

Home values and rentsIncome, education and commute

Economy and federal money

Jobs, pay, income and spending are for Williamson County. PPP loans are for Round Rock.

Details

Unemployment rate

4.0%

Aug 2026, +0.1 pts in a year

Average annual pay

$82,562

238,420 jobs, 2025

Income per person

$76,156

BEA, 2024

Federal spending

$4.8B

FY 2026, $7,808 per person

PPP loans

$313M

4,642 loans, 40,298 jobs reported

Williamson County economyFederal spendingPPP loans

How people get to work

Round Rock, TX, workers 16 and older. American Community Survey 5-year estimates

  • Drove alone64.1%
  • Carpooled8.8%
  • Public transit0.1%
  • Walked0.9%
  • Bicycle0.0%
  • Taxi, ride-hailing, motorcycle or other1.3%
  • Worked from home24.8%

Average one-way commute: 24.9 minutes for people who do not work from home.

Environment and hazard risk

Round Rock, TX, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Moderate

Top: hail

Storm events since 1996

876

Countywide, mostly hail

Flood insurance policies

1,949

1.1% of homes, county

July high / Jan low

96° / 38°F

37.1 inches of rain a year

Hazards, floods and storm historyCheck a flood zone3 historic places

Health statistics

Share of adults in Round Rock, TX, CDC PLACES estimates

All 40 measures

Obesity

34.2%

U.S. 33.3% +0.9 pts

Diabetes

9.8%

U.S. 12.1% -2.3 pts

Smoking

10.6%

U.S. 12.8% -2.2 pts

Uninsured (18-64)

14.1%

U.S. 11.1% +3.0 pts

ZIP codes in Round Rock

3 in or overlapping Round Rock. Population shown

·

Cities near Round Rock

NameDistanceLand area (sq mi)
Brushy CreekCensus-designated place2.8 mi6.4
Wells BranchCensus-designated place6.1 mi2.4
PflugervilleCity6.9 mi26
Cedar ParkCity8.3 mi25.6
HuttoCity8.3 mi14.8
GeorgetownCity9 mi58.1
LeanderCity9.6 mi38.8
WeirCity11 mi1.8
SerenadaCensus-designated place12 mi2.2
Santa Rita RanchCensus-designated place12 mi4
VolenteVillage14 mi2.1
Liberty HillCity15 mi4.6
AustinCity15 mi326.4
JonestownCity16 mi6.5
Hudson BendCensus-designated place16 mi4
ManorCity17 mi9.8

Frequently asked questions

What county is Round Rock, TX in?
Round Rock is in Williamson County, Texas.
What ZIP codes are in Round Rock, TX?
ZIP codes in or overlapping Round Rock include 78664, 78665, 78681.
What is the population of Round Rock, TX?
About 127,786 people live in Round Rock, based on American Community Survey 5-year estimates.
What cities are near Round Rock?
Nearby places include Brushy Creek (2.8 mi), Wells Branch (6.1 mi), Pflugerville (6.9 mi), Cedar Park (8.3 mi), Hutto (8.3 mi).

Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023