ZIP Code 78664
standardSource:
Round Rock · Williamson County · Texas
- Population
- 52,932
- Median income
- $87,417
- Median home value
- $358,200
- Bachelor's or higher
- 36.4%
- Land area
- 42.9 sq mi
1,233/sq mi
▲ 15% vs US
higher than 71% of US ZIPs
▲ 29% vs US
higher than 75% of US ZIPs
Median age 35.1
Chicago
ZIP code 78664 in Round Rock, Texas has a population of 52,932. The median household income is $87,417, which is 15% above the national average. Median home value is $358,200, 29% above the US average. 36.4% of residents hold a bachelor's degree or higher.
ZIP code 78664 is classified by USPS as a standard delivery area and covers roughly 42.9 square miles in Round Rock, Williamson County, Texas. The area is home to 52,932 residents, producing a population density of 1,233 people per square mile, and falls within the Chicago time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 78664 against Texas and the nation.
On the economic side, the median household income for ZIP 78664 sits at $87,417 (16% above the Texas average), while per-capita income is $43,876. The poverty rate stands at 10.2% and the unemployment rate at 4.4%. On housing, the median home value is $358,200 (45% above the state average) with median rent at $1,692 per month, and 53.7% of occupied units are owner-occupied, a direct signal of whether 78664 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 36.4% of adults hold a bachelor's degree or higher, the median age is 35.1, and the average commute is 26 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Williamson County, so you can benchmark 78664 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →
Top industries in ZIP 78664
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 78664.
- Retail trade
Retail trade
284 establishments
- Professional, scientific, and technical services
Professional, scientific, and technical services
264 establishments
- Health care and social assistance
Health care and social assistance
202 establishments
- Accommodation and food services
Accommodation and food services
188 establishments
- Construction
Construction
176 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 + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, FHFA HPI for ZIP 78664, Round Rock, TX · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; HUD FMR + FHFA HPI updated quarterly/annually.
Quick Facts
52,932
Population
42.9
Area (sq mi)
1,233
People / sq mi
Chicago
Time Zone
standard
ZIP Type
Who lives in ZIP 78664?
35.1
Median Age
48.4%
Male
51.6%
Female
18.1%
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?
$87,417
Median Household Income
+16% vs state
$43,876
Per Capita Income
10.2%
Poverty Rate
4.4%
Unemployment Rate
25.6 min
Mean Commute Time
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?
24,497
Total Housing Units
23,484
Occupied Units
1,013
Vacant Units
2.62
Avg Household Size
Occupancy Type
$358,200
Median Home Value
+45% vs state
$1,692
Median Rent
1997
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
-2.5%
YoY Change (2024)
304
HPI Index (2000 = 100)
+204%
Total Change Since 2000
Home values in ZIP 78664 have decreased 2.5% over the past year (2024). Since 2000, this ZIP has seen +204% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +5.6% | 211 |
| 2021 | +28.9% | 271 |
| 2022 | +25.8% | 341 |
| 2023 | -8.6% | 312 |
| 2024 | -2.5% | 304 |
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 1,841 business establishments in ZIP 78664, employing approximately 28,470 people with a combined annual payroll of $1,649,775,000.
1,841
Businesses
28,470
Employees
$1.6B
Annual Payroll
18
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Retail trade | 284 | 15.4% |
| Professional, scientific, and technical services | 264 | 14.3% |
| Health care and social assistance | 202 | 11.0% |
| Accommodation and food services | 188 | 10.2% |
| Construction | 176 | 9.6% |
| Other services (except public administration) | 157 | 8.5% |
| Finance and insurance | 110 | 6.0% |
| Real estate and rental and leasing | 106 | 5.8% |
| Administrative and support and waste management and remediation services | 87 | 4.7% |
| Wholesale trade | 62 | 3.4% |
| Transportation and warehousing | 49 | 2.7% |
| Manufacturing | 40 | 2.2% |
| Information | 38 | 2.1% |
| Arts, entertainment, and recreation | 32 | 1.7% |
| Educational services | 31 | 1.7% |
| Management of companies and enterprises | 8 | 0.4% |
| Utilities | 3 | 0.2% |
| Industries not classified | 3 | 0.2% |
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 78664 vs 78665 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 78665 | Round Rock, TX | 35,985 | 2.8 mi |
| 78728 | Austin, TX | 20,299 | 4.2 mi |
| 78681 | Round Rock, TX | 50,606 | 5.1 mi |
| 78660 | Pflugerville, TX | 68,789 | 5.2 mi |
| 78717 | Austin, TX | 22,538 | 6.5 mi |
| 78727 | Austin, TX | 26,689 | 6.7 mi |
| 78754 | Austin, TX | 15,036 | 10.3 mi |
| 78753 | Austin, TX | 49,301 | 8.6 mi |
| 78634 | Hutto, TX | 22,791 | 7.1 mi |
| 78729 | Austin, TX | 27,108 | 7.3 mi |
More ZIP Codes in Williamson County
Related Areas
Frequently Asked Questions
What county is ZIP code 78664 in? ▼
What is the population of ZIP code 78664? ▼
What is the median household income in ZIP 78664? ▼
What is the average home value in ZIP 78664? ▼
What is the demographic makeup of ZIP 78664? ▼
How many businesses are in ZIP code 78664? ▼
What are the main industries in ZIP code 78664? ▼
How have home values changed in ZIP code 78664? ▼
What is the education level in ZIP code 78664? ▼
What is the average commute time in ZIP 78664? ▼
What percentage of residents own vs. rent in ZIP 78664? ▼
What is the poverty rate in ZIP code 78664? ▼
ZIP Code Research Guides
Official Data Resources for Round Rock, TX
Verify and explore additional data for this area using these official government sources.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023). Business data: Source: Census ZIP Code Business Patterns (ZBP) 2023. Home value trends: Source: FHFA House Price Index (HPI), Five-Digit ZIP Codes.
PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.
Read our methodology , how this data is sourced, computed, and verified.