PlainZIP

Round Rock, TX · standard

ZIP Code 78681

Williamson County, Texas - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

50,606
899/sq mi
$137,819
Median income
$497,300
Median home value
58.0%
Bachelor's or higher

The verdict

Round Rock pairs a top-decile household income with upper-quartile home values, in a low-density, homeowner-dominated and unusually populous area.

Top 5%
household income, US ZIPs
Top 13%
home value, US ZIPs
899
people per sq mi
74%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 78681 against every reporting US ZIP.

ZIP code 78681 is a densely settled ZIP (a standard USPS delivery area) in Round Rock, Williamson County, Texas, with 50,606 residents across 56.3 square miles, a density of 899 people per square mile, in the Chicago time zone.

ZIP 78681 skews affluent, with a median household income of $137,819 (82% above the Texas average), while per-capita income is $59,301. Local economic indicators show a 5.5% poverty rate alongside 3.0% unemployment. Housing costs here run $497,300 for a typical home value (101% above the state average), with rent averaging $1,963 a month; 73.9% of homes are owner-occupied.

This is a highly-educated ZIP: 58.0% of adults hold a bachelor's degree or higher, the median age is 39.3, and the average commute is 24 minutes. A geography-based comparison follows: 10 ZIP codes within about 10 miles of 78681, plus 6 more within Williamson County, give a clearer read than the national average alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 78681

Top 5 sectors by establishment count in Round Rock, TX

Which industries have the most business establishments in ZIP 78681.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 78681, Round Rock, TX · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

50,606

Population

56.3

Area (sq mi)

899

People / sq mi

Chicago

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 78681?

39.3

Median Age

51.3%

Male

48.7%

Female

16.9%

Foreign-Born

White 61.8%
African American 4.6%
Asian 13.0%
American Indian or Alaska Native 0.5%
Native Hawaiian or Pacific Islander 0.1%
Two or More Ethnicities 15.4%
Hispanic or Latino 22.0%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$137,819

Median Household Income

+82% vs state

$59,301

Per Capita Income

5.5%

Poverty Rate

3.0%

Unemployment Rate

23.6 min

Mean Commute Time

How ZIP 78681 ranks nationally

Round Rock, TX household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$137,819 Top 5% higher than 95% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Below this entry. $120,000–$140,000: 1,362 US ZIPs (4%). This entry sits in this band. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 70.2%
Bachelor's Degree or Higher 58.0%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

20,781

Total Housing Units

20,135

Occupied Units

646

Vacant Units

2.80

Avg Household Size

Occupancy Type

Owner 73.9%
Renter 26.1%

$497,300

Median Home Value

+101% vs state

$1,963

Median Rent

1999

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+1.9%

YoY Change (2024)

330

HPI Index (2000 = 100)

+230%

Total Change Since 2000

Home values in ZIP 78681 have increased 1.9% over the past year (2024). Since 2000, this ZIP has seen +230% cumulative appreciation.

Year Annual Change HPI Index
2020 +6.0% 227
2021 +25.7% 285
2022 +27.1% 363
2023 -10.7% 324
2024 +1.9% 330

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 1,432 business establishments in ZIP 78681, employing approximately 19,609 people with a combined annual payroll of $1,265,360,000.

1,432

Businesses

19,609

Employees

$1.3B

Annual Payroll

16

Industry Sectors

Industry Establishments % of Total
Professional, scientific, and technical services 260 18.2%
Health care and social assistance 226 15.8%
Accommodation and food services 146 10.2%
Construction 119 8.3%
Retail trade 119 8.3%
Other services (except public administration) 115 8.0%
Real estate and rental and leasing 102 7.1%
Finance and insurance 70 4.9%
Administrative and support and waste management and remediation services 69 4.8%
Wholesale trade 49 3.4%
Manufacturing 32 2.2%
Educational services 32 2.2%
Information 31 2.2%
Arts, entertainment, and recreation 26 1.8%
Transportation and warehousing 24 1.7%
Management of companies and enterprises 8 0.6%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 78681 vs 78717 →

ZIP 78681 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 78681 ranks #3 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 78681 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 78681 ranks #2 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
78717 Austin, TX 22,538 3.5 mi
78665 Round Rock, TX 35,985 4.9 mi
78729 Austin, TX 27,108 5.5 mi
78664 Round Rock, TX 52,932 5.1 mi
78727 Austin, TX 26,689 7.2 mi
78728 Austin, TX 20,299 5.7 mi
78613 Cedar Park, TX 65,099 6.3 mi
78628 Georgetown, TX 23,727 7.6 mi
78758 Austin, TX 44,072 10.1 mi
78759 Austin, TX 38,891 9.3 mi

More ZIP Codes in Williamson County

78613 standard
Cedar Park, TX
Pop: 65,099
78664 standard
Round Rock, TX
Pop: 52,932
78641 standard
Leander, TX
Pop: 44,295
78665 standard
Round Rock, TX
Pop: 35,985
78729 standard
Austin, TX
Pop: 27,108
78626 standard
Georgetown, TX
Pop: 25,996

Related Areas

Williamson County Round Rock, TX Texas

Frequently Asked Questions

What county is ZIP code 78681 in? ▼
ZIP code 78681 (Round Rock) is located in Williamson County, Texas. Williamson County contains multiple ZIP codes, see the full list at /counties/williamson-tx.
What is the population of ZIP code 78681? ▼
ZIP code 78681 in Round Rock, TX has a population of 50,606 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 78681? ▼
The median household income in ZIP 78681 is $137,819, which is 81% above the national average of $76,288.
What is the average home value in ZIP 78681? ▼
The median home value in ZIP 78681 is $497,300, which is 79% above the national average of $278,155.
What is the demographic makeup of ZIP 78681? ▼
The largest racial group in ZIP 78681 is White at 61.8%. Hispanic or Latino residents make up 22.0% of the population.
How many businesses are in ZIP code 78681? ▼
ZIP code 78681 has 1,432 business establishments employing approximately 19,609 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 78681? ▼
The top industries by establishment count in ZIP 78681 are: Professional, scientific, and technical services (260), Health care and social assistance (226), Accommodation and food services (146). There are 16 industry sectors represented in total.
How have home values changed in ZIP code 78681? ▼
According to the FHFA House Price Index, home values in ZIP 78681 increased by 1.9% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 230%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 78681? ▼
In ZIP code 78681, 70.2% of residents aged 25+ have a high school diploma or higher, and 58.0% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 78681? ▼
The mean commute time for workers in ZIP code 78681 is 23.6 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend less time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 78681? ▼
In ZIP code 78681, approximately 73.9% of occupied housing units are owner-occupied and 26.1% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 78681? ▼
The poverty rate in ZIP code 78681 is 5.5% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.