78681 ZIP Code — Round Rock, TX

Williamson County, Texas

ZIP code 78681 is located in Round Rock, Texas, within Williamson County. It covers approximately 23.19 square miles and serves a population of 57,760 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 512.

About ZIP code 78681

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $418,900. Owner-occupancy sits near the national average at 74%.

Median household income is $123,948. The poverty rate of 5% is below the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 25 minutes is near the national average. Remote work is prevalent — 24% of workers work from home.

Educational attainment is high — 55% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 78681 reflects a community defined by a highly educated population and a high rate of remote workers.

57,760

population

23.19

sq mi land

Standard

ZIP type

Central (CT)

timezone

78681 ZIP code map

Cities in ZIP code 78681

Below are the cities the US Postal Service accepts for ZIP code 78681. Using any city not on this list may result in mail delivery delays.

City	Status
Round Rock	Preferred

Nearby ZIP codes

78717 Austin (3 mi) 78717 Austin (3 mi) 78682 Round Rock (3.5 mi) 78682 Round Rock (3.5 mi) 78729 Austin (4.7 mi) 78729 Austin (4.7 mi) 78728 Austin (5 mi) 78728 Austin (5 mi) 78665 Round Rock (5 mi) 78665 Round Rock (5 mi) 78613 Cedar Park (5.4 mi) 78613 Cedar Park (5.4 mi)

Demographics updated 06/2026

Population
Total population	57,760
Population density	2,491 / sq mi
State FIPS	48
County FIPS	491

Geography
Land area	23.19 sq mi
Water area	0.14 sq mi
Latitude	30.5196
Longitude	-97.7277
Timezone	Central (CT)
Area code	512

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	17.0%	23.0%	39.5%
$50k – $100k	28.1%	30.5%	30.1%
$100k – $200k	37.6%	34.7%	22.6%
Over $200k	17.3%	11.8%	7.8%

Demographics & statistics

57,760

Population

2,491

People per sq mi

39.4

Median age

$123,948

Median household income

$52,165

Per capita income

$418,900

Median home value

$1,781

Median monthly rent

74.2%

Home ownership

4.8%

Poverty rate

3.3%

Unemployment

15,554

Housing units

55.3%

Bachelor's or higher

Age distribution

Male Female

1,443

Under 5

1,383

2,406

5–9

2,305

2,783

10–14

2,665

2,317

15–19

2,220

1,451

20–24

1,389

2,704

25–34

2,591

4,858

35–44

4,653

5,136

45–54

4,920

1,524

55–59

1,459

1,704

60–64

1,633

2,061

65–74

1,974

815

75–84

781

299

85+

286

← Male

Female →

Age summary

Group	Count	%
Under 18	16,079	27.8%
18 and over	41,681	72.2%
65 and over	6,216	10.8%
Median age	39.4 years

Race & ethnicity

White 61.6%

Asian 11.3%

Hispanic or Latino 9.4%

Two or more races 9.3%

Black or African American 4.6%

Other race 3.3%

American Indian / Alaska Native 0.3%

Native Hawaiian / Pacific Islander 0.2%

Group	Count	%
White	39,276	61.6%
Asian	7,222	11.3%
Hispanic or Latino	6,010	9.4%
Two or more races	5,905	9.3%
Black or African American	2,912	4.6%
Other race	2,134	3.3%
American Indian / Alaska Native	213	0.3%
Native Hawaiian / Pacific Islander	98	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	17.0%	23.0%	39.5%
$50k – $100k	28.1%	30.5%	30.1%
$100k – $200k	37.6%	34.7%	22.6%
Over $200k	17.3%	11.8%	7.8%

Under $10k 1.8%

$10k–$15k 1.3%

$15k–$25k 3.2%

$25k–$35k 2.8%

$35k–$50k 4.6%

$50k–$75k 14.7%

$75k–$100k 10.8%

$100k–$150k 21.7%

$150k–$200k 16.9%

$200k+ 22.2%

Range	% of households
Under $10k	1.8%
$10k–$15k	1.3%
$15k–$25k	3.2%
$25k–$35k	2.8%
$35k–$50k	4.6%
$50k–$75k	14.7%
$75k–$100k	10.8%
$100k–$150k	21.7%
$150k–$200k	16.9%
$200k+	22.2%
Median income	$123,948

Housing

Home values

Under $50k 1.6%

$50k–$100k 0.7%

$100k–$150k 2.2%

$150k–$200k 1.7%

$200k–$300k 17.1%

$300k–$500k 46.2%

$500k–$1M 28.7%

$1M+ 1.8%

Housing overview

Metric	Value
Median home value	$418,900
Median rent / month	$1,781
Owner occupied	74.2%
Renter occupied	25.8%
Vacant	3.4%
Single-family detached	82.4%
Large apartment buildings	8.0%
Mobile homes	0.9%
Median rooms	6.7
Avg household size (owned)	2.95

Year built

Era	%
2020 or later	0.8%
2010–2019	15.1%
2000–2009	28.7%
1990–1999	22.1%
1980–1989	17.8%
1970–1979	11.9%
1960–1969	1.7%
1950–1959	0.8%
1940–1949	0.6%
1939 or earlier	0.4%

Bedrooms

Size	% of units
No bedroom (studio)	1.8%
1 bedroom	7.7%
2 bedrooms	7.5%
3 bedrooms	34.7%
4 bedrooms	39.3%
5+ bedrooms	8.9%

Vehicles per household

Vehicles	% of households
No vehicle	3.1%
1 vehicle	22.5%
2 vehicles	48.7%
3 or more	25.7%

Heating fuel

Fuel type	%
Utility gas	65.6%
Electricity	32.8%
Propane / LP gas	1.1%
Wood	0.1%
Solar	0.2%
No fuel used	0.2%

Households & families

Household type	Count	%
Married-couple family	12,840	64.2%
Cohabiting couple	979	4.9%
Male householder, no spouse	2,947	14.7%
Female householder, no spouse	3,239	16.2%
Households with children under 18	8,977	44.9%
Households with seniors (65+)	4,175	20.9%
Average household size	2.88

Marital status

Status	Male	Female
Never married	28.7%	22.7%
Married	59.7%	60.6%
Separated	1.8%	2.5%
Widowed	1.9%	4.2%
Divorced	7.9%	10.0%

Education

Less than 9th grade 2.8%

Some HS, no diploma 1.9%

HS graduate 11.5%

Some college, no degree 20.1%

Associate's degree 8.5%

Bachelor's degree 35.6%

Graduate / professional 19.6%

Metric	%
HS diploma or higher	95.4%
Bachelor's or higher	55.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	1,330	7.6%
Kindergarten	1,132	6.5%
Elementary school	7,786	44.4%
High school	4,222	24.1%
College / grad school	3,080	17.5%

Employment

Industry of employment

Education & healthcare 18.5%

Professional & management 17.7%

Retail trade 10.6%

Manufacturing 10.4%

Arts, food & hospitality 8.4%

Finance & real estate 7.9%

Transportation & utilities 6.1%

Public administration 5.8%

Construction 5.7%

Other services 4.5%

Information 2.3%

Wholesale trade 2.0%

Agriculture & mining 0.2%

Occupation

Category	%
Management, business & arts	56.9%
Service	10.6%
Sales & office	21.0%
Natural resources & construction	5.1%
Production & transportation	6.5%

Employment type

Type	%
Private sector	77.8%
Government	15.4%
Self-employed	6.8%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	67.4%
Carpool	7.5%
Public transit	0.1%
Walk	0.8%
Work from home	23.5%
Other means	0.7%
Avg commute (minutes)	24.5

Poverty

All people 4.8%

Under 18 years 4.7%

18 and over 4.9%

Married-couple families 1.8%

Female-led households 11.9%

Income support

Source	% of households
Social Security	21.6%
Retirement income	20.1%
Supplemental Security	2.2%
Cash public assistance	2.5%
Food stamps / SNAP	3.4%

Health indicators

Condition	%
Obesity	29.5%
High blood pressure	26.2%
High cholesterol	31.6%
Diabetes	7.6%
Heart disease	3.7%
Stroke	1.7%
Asthma	8.1%
Arthritis	18.1%
Kidney disease	1.9%
Pulmonary disease	3.7%
Cancer	4.8%

Behavior / access	%
Smoking	12.2%
Binge drinking	21.5%
No physical activity	16.3%
Less than 7 hrs sleep	30.8%
Depression	20.5%
Fair or poor health	9.7%
Poor mental health	13.1%
Poor physical health	7.4%
No health insurance	18.4%
Visited doctor (checkup)	68.9%
Visited dentist	67.2%
Cholesterol screening	90.8%
Teeth loss	7.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	3,314	8.0%

Disability	%
Any disability	8.7%
Under 18	5.3%
18–64 years	7.3%
65 and over	25.6%

Health insurance coverage

Type	%
Private insurance	84.2%
Public insurance	16.4%
No insurance	8.0%
Uninsured under 19	4.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	54,934	95.1%
Spanish	3,810	6.9%
Other Indo-European	2,512	4.6%
Asian & Pacific Islander	341	0.6%
Other languages	957	1.7%

Place of birth & citizenship

Origin	Count	%
Native born (US)	48,672	84.3%
Born in same state	47,377	82.0%
Born in different state	28,681	49.7%
Foreign born	1,295	2.2%
Naturalized citizen	9,088	15.7%
Not a US citizen	4,074	44.8%

Ancestry

Ancestry	Count	%
French	6,551	11.3%
Italian	5,022	8.7%
Arab	2,339	4%
Polish	529	0.9%
English	453	0.8%

Ancestry	Count	%
Dutch	352	0.6%
German	244	0.4%
Irish	130	0.2%
Norwegian	65	0.1%

Technology access

Metric	% of households
Computer access	34.6%
Internet access	97.6%

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

Frequently asked questions about ZIP code 78681

What part of Round Rock is ZIP code 78681?

ZIP code 78681 covers a portion of Round Rock, Texas, within Williamson County.

What county is ZIP code 78681 in?

ZIP code 78681 falls within Williamson County, Texas.

How educated is the population of ZIP code 78681?

55% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the median household income in ZIP code 78681?

The median household income in ZIP code 78681 is $123,948, above the national median of ~$75,000.

What is the typical home value in ZIP code 78681?

The median home value in ZIP code 78681 is $418,900.

What is the population of ZIP code 78681?

ZIP code 78681 has an estimated population of 57,760 residents, with a density of 2,491 people per square mile.

What timezone is ZIP code 78681 in?

ZIP code 78681 observes the CST timezone.