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 High-density area
- $137,819
- Median income Above-median income area
- $497,300
- Median home value Above-median home value
- 58.0%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
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.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 78681 (Round Rock, TX) rose +1.9% from 2023 to 2024. The all-transactions index moved from 324.0 in 2023 to 330.2 in 2024 (2000 = 100).
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 average Texas ZIP), while per-capita income is $59,301. Both reported hardship measures are comparatively low in absolute terms: poverty is 5.5% and unemployment is 3.0%. Housing is both higher-cost and owner-heavy: median home value is $497,300 (101% above the average Texas ZIP), while 73.9% of occupied homes are owner-occupied and median rent is $1,963.
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. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Williamson County, so 78681 can be compared with both its immediate and county-level context.
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.
- Professional, scientific, and technical services
Professional, scientific, and technical services
260 establishments
- Health care and social assistance
Health care and social assistance
226 establishments
- Accommodation and food services
Accommodation and food services
146 establishments
- Construction
Construction
119 establishments
- Retail trade
Retail trade
119 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, 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
Who lives in ZIP 78681?
39.3
Median Age
51.3%
Male
48.7%
Female
16.9%
Foreign-Born
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 ZIP avg
$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
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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
20,781housing units
20,781
Total Housing Units
20,135
Occupied Units
646
Vacant Units
2.80
Avg Household Size
Occupancy Type
$497,300
Median Home Value
+101% vs state ZIP avg
$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.
- 78613
Cedar Park (78613)
65,099 residents
- 78664
Round Rock (78664)
52,932 residents
- 78681
Round Rock (78681)
50,606 residents
- 78758
Austin (78758)
44,072 residents
- 78759
Austin (78759)
38,891 residents
- 78665
Round Rock (78665)
35,985 residents
- 78729
Austin (78729)
27,108 residents
- 78727
Austin (78727)
26,689 residents
- 78628 23,727
Georgetown (78628)
23,727 residents
What this shows Among its immediate neighbors, ZIP 78681 ranks #3 by population - useful context the national average alone can't give.
ZIP 78681 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 78717
Austin (78717)
$145,325 median income
- 78681
Round Rock (78681)
$137,819 median income
- 78628
Georgetown (78628)
$125,635 median income
- 78613
Cedar Park (78613)
$125,487 median income
- 78665
Round Rock (78665)
$122,680 median income
- 78727
Austin (78727)
$110,379 median income
- 78759
Austin (78759)
$102,400 median income
- 78664
Round Rock (78664)
$87,417 median income
- 78729
Austin (78729)
$86,438 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.
| 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 |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 78681, both outside TX so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (50,606 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Williamson County
Related Areas
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.
Related
Take this with you
What to do with ZIP 78681's numbers, next.
- See how ZIP 78681 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Round Rock, TX ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
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ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.