Austin County · Texas
ZIP code 78931
- Population
- 204
- Median income
- $138,382
- Median home
- —
- Sales tax
- 6.25%
ZCTA residents
Household, past 12 months
Owner-occupied value
Texas state rate
Quick answer
ZIP 78931 sits in Austin County, Texas and is home to 204 people. Median household income is $138,382, the median home is worth — and median gross rent is —. 100% of households own their home, and purchases are taxed at 6.25% (Texas state rate).
- County
- Austin County
- State
- Texas (TX)
- Area codes
- Not published
- Metro area
- Outside covered metros
FIPS 48015
1,989 ZIPs covered
No NANPA match for this ZIP
Rate jurisdiction used for tax
The numbers for 78931
American Community Survey 2019-2023 ACS 5-year estimates for this ZCTA.
- Population
- 204ZIP 78931 residents
- Median household income
- $138,382Past 12 months, inflation adjusted
- Median home value
- —Owner-occupied units
- Median gross rent
- —Rent plus utilities, monthly
- Median age
- 44.6 yrsAll residents
- Homeownership rate
- 100%Owner-occupied households
Sales tax in 78931
What a purchase inside this ZIP costs at checkout.
Texas levies 6.25% statewide, and counties, cities and special districts inside this ZIP can add their own local rate on top. Check the county page for the local component before you quote a price.
Affordability in this ZIP
Derived from the Census medians above — indicative, not an offer.
A rent burden above 30% is the federal threshold for cost-burdened households, and a price-to-income multiple above 4× is generally considered a stretched housing market. The mortgage figure is principal and interest only — taxes, insurance and HOA dues are extra.
How 78931 compares
ZIP 78931 against the median ZIP in Austin County and across Texas.
| Measure | ZIP 78931 | County median | State median | vs state |
|---|---|---|---|---|
| Median household income | $138,382 | $92,322 | $68,103 | +103% |
| Median home value | — | $304,500 | $194,900 | — |
| Median gross rent | — | $1,079 | $1,105 | — |
| Population | 204 | 2,244 | 5,317 | -96% |
Medians are computed across the 7 ZIP areas in Austin County and the 1989 ZIP areas in Texas.
Statewide rank
Where this ZIP places among all 1989 Texas ZIP areas.
- Income
- #63
- Home value
- —
- Population
- #1,745
richer than 96% of 1,756 state ZIPs
Not published
larger than 12% of 1,989 state ZIPs
Comparable ZIP codes
Texas ZIP areas with almost the same household income.
Nearby ZIP codes
Other ZIP codes filed under Austin County.
ZIP 78931 questions
Common questions about this ZIP code.
- Where is ZIP code 78931?
- ZIP 78931 lies mostly in Austin County, Texas. County assignment follows the largest share of land area, so a ZIP straddling a county line is filed under its dominant county.
- What sales tax do I pay in 78931?
- Texas charges 6.25% statewide, plus any county, city or district rate that applies locally.
- Is 78931 expensive to live in?
- Median rent runs — a month, and the median home is worth — — — against the typical Texas ZIP.
- Is a ZCTA the same as a postal ZIP code?
- Not exactly. The Census builds ZIP Code Tabulation Areas from the ZIP codes of addresses inside each census block, so a ZCTA can differ slightly from the USPS delivery route of the same number, and PO-box-only ZIPs have no ZCTA at all.
Keep going
Related pages for this area.
Sources & transparency
- US Census Bureau, ACS 2019-2023 5-year estimates — 2019-2023 ACS 5-year — population, income, housing
- Census 2020 ZCTA-to-county relationship file — County assignment by largest land-area overlap
- Texas Comptroller of Public Accounts — Sales tax rates and local add-ons
Last reviewed December 2024. Figures are published for reference and can change; verify with the source agency before filing or contracting. How we build and check this data.