Williamson County, TX ZIP Codes

Texas (TX)  ·  27 ZIP codes  ·  16 cities
27
ZIP codes
643,026
population (2021)
+52.1%
pop change since 2010
48491
FIPS code
Williamson County ZIP code map
About Williamson County
Williamson County is located in Texas and contains 27 ZIP codes across 16 cities and communities. The county's population was 643,026 as of 2021, an increase of 52.1% from 422,679 in 2010. The timezone is Mountain Time (observes DST). The Federal Information Processing System (FIPS) code for Williamson County is 48491.
Population
2021 population643,026
2010 population422,679
Change+52.1%
County details
StateTexas
FIPS code48491
TimezoneMountain
Daylight savingYes
Cities in Williamson County
Austin Cedar Park Coupland Florence Georgetown Granger Hutto Jarrell Leander Liberty Hill Round Rock Schwertner Taylor Thrall Walburg Weir
ZIP codes for Williamson County, TX (27)
ZIP code City County Map
76527 Florence Williamson View map
76530 Granger Williamson View map
76537 Jarrell Williamson View map
76573 Schwertner Williamson View map
76574 Taylor Williamson View map
76578 Thrall Williamson View map
78613 Cedar Park Williamson View map
78615 Coupland Williamson View map
78626 Georgetown Williamson View map
78627 Georgetown Williamson View map
78628 Georgetown Williamson View map
78630 Cedar Park Williamson View map
78633 Georgetown Williamson View map
78634 Hutto Williamson View map
78641 Leander Williamson View map
78642 Liberty Hill Williamson View map
78646 Leander Williamson View map
78664 Round Rock Williamson View map
78665 Round Rock Williamson View map
78673 Walburg Williamson View map
78674 Weir Williamson View map
78680 Round Rock Williamson View map
78681 Round Rock Williamson View map
78682 Round Rock Williamson View map
78683 Round Rock Williamson View map
78717 Austin Williamson View map
78729 Austin Williamson View map

Demographics & statistics

634,655
Population
38.0
Median age
$108,135
Median household income
$48,656
Per capita income
$347,817
Median home value
$1,450
Median monthly rent
72.6%
Home ownership
6.4%
Poverty rate
4.5%
Unemployment
173,567
Housing units
39.4%
Bachelor's or higher

Age distribution

Male Female
19,252
Under 5
19,431
21,609
5–9
21,810
23,756
10–14
23,977
21,398
15–19
21,597
17,400
20–24
17,561
42,957
25–34
43,357
51,990
35–44
52,474
44,091
45–54
44,502
17,391
55–59
17,552
16,148
60–64
16,298
24,703
65–74
24,933
11,376
75–84
11,482
3,787
85+
3,823
← Male
Female →

Age summary

GroupCount%
Under 18157,50024.4%
18 and over477,15575.6%
65 and over80,10414.7%
Median age38.0 years

Race & ethnicity

White 60.1%
Hispanic or Latino 11.4%
Two or more races 11.1%
Asian 7.2%
Black or African American 6%
Other race 3.7%
American Indian / Alaska Native 0.4%
Native Hawaiian / Pacific Islander 0.1%
GroupCount%
White430,08460.1%
Hispanic or Latino81,35611.4%
Two or more races79,37011.1%
Asian51,7427.2%
Black or African American43,1346%
Other race26,4503.7%
American Indian / Alaska Native3,0990.4%
Native Hawaiian / Pacific Islander7760.1%

Household income

Under $10k 3.0%
$10k–$15k 1.6%
$15k–$25k 4.2%
$25k–$35k 5.0%
$35k–$50k 8.6%
$50k–$75k 16.5%
$75k–$100k 13.0%
$100k–$150k 21.8%
$150k–$200k 12.5%
$200k+ 13.8%
Range% of households
Under $10k3.0%
$10k–$15k1.6%
$15k–$25k4.2%
$25k–$35k5.0%
$35k–$50k8.6%
$50k–$75k16.5%
$75k–$100k13.0%
$100k–$150k21.8%
$150k–$200k12.5%
$200k+13.8%
Median income$108,135

Housing

Home values

Under $50k 2.7%
$50k–$100k 3.5%
$100k–$150k 4.2%
$150k–$200k 5.6%
$200k–$300k 23.4%
$300k–$500k 36.7%
$500k–$1M 20.6%
$1M+ 3.4%

Housing overview

MetricValue
Median home value$347,817
Median rent / month$1,450
Owner occupied72.6%
Renter occupied27.4%
Vacant5.9%
Single-family detached75.8%
Large apartment buildings6.3%
Mobile homes6.3%
Median rooms5.9
Avg household size (owned)2.81

Year built

Era%
2020 or later3.3%
2010–201928.1%
2000–200926.2%
1990–199914.6%
1980–198911.8%
1970–19796.9%
1960–19691.9%
1950–19591.7%
1940–19491.5%
1939 or earlier3.9%

Bedrooms

Size% of units
No bedroom (studio)1.6%
1 bedroom7.8%
2 bedrooms16.0%
3 bedrooms43.8%
4 bedrooms25.8%
5+ bedrooms4.9%

Vehicles per household

Vehicles% of households
No vehicle2.3%
1 vehicle27.4%
2 vehicles45.0%
3 or more25.3%

Heating fuel

Fuel type%
Utility gas35.4%
Electricity56.3%
Propane / LP gas6.9%
Wood0.2%
Solar0.7%
No fuel used0.3%

Households & families

Household typeCount%
Married-couple family138,14358.0%
Cohabiting couple14,6746.3%
Male householder, no spouse33,13814.7%
Female householder, no spouse49,11521.0%
Households with children under 1890,46036.6%
Households with seniors (65+)55,22326.5%
Average household size2.70

Marital status

StatusMaleFemale
Never married29.4%25.1%
Married59.1%55.5%
Separated1.4%1.3%
Widowed2.6%7.0%
Divorced7.5%11.2%

Education

Less than 9th grade 3.9%
Some HS, no diploma 4.1%
HS graduate 22.5%
Some college, no degree 21.8%
Associate's degree 8.3%
Bachelor's degree 25.4%
Graduate / professional 14.0%
Metric%
HS diploma or higher92.1%
Bachelor's or higher39.4%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool11,5967.7%
Kindergarten9,5285.8%
Elementary school71,44744.3%
High school37,08222.4%
College / grad school35,38019.8%

Employment

Industry of employment

Education & healthcare 20.6%
Professional & management 15.1%
Retail trade 11.6%
Manufacturing 9.1%
Construction 8.7%
Arts, food & hospitality 7.0%
Finance & real estate 6.8%
Public administration 6.2%
Other services 5.4%
Transportation & utilities 4.4%
Wholesale trade 2.4%
Information 1.6%
Agriculture & mining 1.1%

Occupation

Category%
Management, business & arts46.4%
Service13.8%
Sales & office20.8%
Natural resources & construction9.2%
Production & transportation9.8%

Employment type

Type%
Private sector77.7%
Government15.1%
Self-employed7.1%
Unpaid family workers0.2%

Commute

Method%
Drive alone70.8%
Carpool8.6%
Public transit0.3%
Walk0.7%
Other means1.3%
Avg commute (minutes)30.2

Poverty

All people 6.4%
Under 18 years 6.7%
18 and over 6.4%
Married-couple families 2.7%
Female-led households 16.5%

Income support

Source% of households
Social Security26.5%
Retirement income22.9%
Supplemental Security2.9%
Cash public assistance1.2%
Food stamps / SNAP7.2%

Health indicators

Condition%
High blood pressure30.0%
High cholesterol33.9%
Heart disease5.1%
Stroke2.4%
Asthma8.6%
Arthritis21.6%
Kidney disease2.4%
Pulmonary disease5.3%
Cancer5.6%
Behavior / access%
Binge drinking20.5%
No physical activity20.1%
Less than 7 hrs sleep31.6%
Fair or poor health12.9%
Poor mental health14.2%
Poor physical health9.3%
No health insurance22.3%
Visited doctor (checkup)69.8%
Visited dentist61.9%
Cholesterol screening89.6%
Teeth loss11.1%

Veterans & disability

VeteransCount%
Civilian veterans39,0778.8%
Disability%
Any disability11.1%
Under 183.8%
18–64 years8.9%
65 and over32.7%

Health insurance coverage

Type%
Private insurance75.6%
Public insurance25.0%
Uninsured under 197.4%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only595,97293.4%
Spanish41,2016.6%
Other Indo-European25,7794.8%
Asian & Pacific Islander5,5080.7%
Other languages8,6751.0%

Place of birth & citizenship

OriginCount%
Native born (US)542,91487.9%
Born in same state530,55686.1%
Born in different state315,49756.3%
Foreign born12,3581.8%
Naturalized citizen91,74112.1%
Not a US citizen43,96450.1%

Ancestry

AncestryCount%
French69,32610.9%
Italian54,7338.6%
Arab28,8004.5%
Polish6,5111%
English5,4700.9%
AncestryCount%
Dutch3,6090.6%
German2,2570.4%
Irish1,5100.2%
Norwegian6670.1%

Technology access

Metric% of households
Computer access37.2%
Internet access96.4%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

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