Harper, TX · standard
ZIP Code 78631
Gillespie County, Texas - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 2,395
- 3/sq mi Low-density area
- $78,560
- Median income Near-median income area
- $351,600
- Median home value Above-median home value
- 24.0%
- Bachelor's or higher Near-average bachelor's attainment
National ZIP placement
Harper pairs an above-median household income with above-median home values, in a rural, homeowner-dominated area.
- Top 40%
- household income, US ZIPs
- Top 26%
- home value, US ZIPs
- 3
- people per sq mi
- 84%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 78631 against every reporting US ZIP.
ZIP code 78631 covers 855.4 square miles in Harper, Gillespie County, Texas (a standard USPS delivery area), with a modest 2,395 residents on file, a density of 3 people per square mile, in the Chicago time zone.
ZIP 78631 lands in the middle-income range, with a median household income of $78,560 (4% above the average Texas ZIP), while per-capita income is $35,226. The poverty rate is 11.1%, with unemployment at 0.6%; those measures add context to the income figure. Housing is both higher-cost and owner-heavy: median home value is $351,600 (42% above the average Texas ZIP), while 84.2% of occupied homes are owner-occupied and median rent is $1,304.
Educational attainment sits below the national norm: 24.0% of adults hold a bachelor's degree or higher, the median age is 43.4, and the average commute is -. The page also surfaces 1 ZIP codes within roughly 10 miles and 5 more in Gillespie County, so 78631 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 78631
Top 5 sectors by establishment count in Harper, TX
Which industries have the most business establishments in ZIP 78631.
- Construction
Construction
15 establishments
- Retail trade
Retail trade
6 establishments
- Administrative and support and waste management and remediation services
Administrative and support and waste management and remediation services
6 establishments
- Other services (except public administration) 5
Other services (except public administration)
5 establishments
- Accommodation and food services 4
Accommodation and food services
4 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 78631, Harper, 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
2,395
Population
855.4
Area (sq mi)
3
People / sq mi
Chicago
Time Zone
standard
ZIP Type
Who lives in ZIP 78631?
43.4
Median Age
58.4%
Male
41.6%
Female
4.0%
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?
$78,560
Median Household Income
+4% vs state ZIP avg
$35,226
Per Capita Income
11.1%
Poverty Rate
0.6%
Unemployment Rate
How ZIP 78631 ranks among Texas ZIPs
Harper, TX household income vs. every Texas ZIP code
Median household income among 1,737 reporting Texas ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$78,560 Top 36% higher than 64% of 1,737 Texas ZIPs
Each bar is a $20K-wide band; taller bars hold more Texas 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
1,571housing units
1,571
Total Housing Units
1,269
Occupied Units
302
Vacant Units
2.73
Avg Household Size
Occupancy Type
$351,600
Median Home Value
+42% vs state ZIP avg
$1,304
Median Rent
2002
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 54 business establishments in ZIP 78631, employing approximately 194 people with a combined annual payroll of $7,170,000.
54
Businesses
194
Employees
$7.2M
Annual Payroll
6
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 15 | 27.8% |
| Retail trade | 6 | 11.1% |
| Administrative and support and waste management and remediation services | 6 | 11.1% |
| Other services (except public administration) | 5 | 9.3% |
| Accommodation and food services | 4 | 7.4% |
| Professional, scientific, and technical services | 3 | 5.6% |
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 78631 vs 78618 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 78618 | Doss, TX | 324 | 12.8 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 78631, 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 (2,395 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Gillespie County
Related Areas
Frequently Asked Questions
What county is ZIP code 78631 in?
ZIP code 78631 (Harper) is located in Gillespie County, Texas. Gillespie County contains multiple ZIP codes, see the full list at /counties/gillespie-tx.
What is the population of ZIP code 78631?
ZIP code 78631 in Harper, TX has a population of 2,395 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 78631?
The median household income in ZIP 78631 is $78,560, which is 3% above the national average of $76,288.
What is the average home value in ZIP 78631?
The median home value in ZIP 78631 is $351,600, which is 26% above the national average of $278,155.
What is the demographic makeup of ZIP 78631?
The largest racial group in ZIP 78631 is White at 73.4%. Hispanic or Latino residents make up 22.0% of the population.
How many businesses are in ZIP code 78631?
ZIP code 78631 has 54 business establishments employing approximately 194 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 78631?
The top industries by establishment count in ZIP 78631 are: Construction (15), Retail trade (6), Administrative and support and waste management and remediation services (6). There are 6 industry sectors represented in total.
What is the education level in ZIP code 78631?
In ZIP code 78631, 60.9% of residents aged 25+ have a high school diploma or higher, and 24.0% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 78631?
In ZIP code 78631, approximately 84.2% of occupied housing units are owner-occupied and 15.8% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 78631?
The poverty rate in ZIP code 78631 is 11.1% 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 78631's numbers, next.
- See how ZIP 78631 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Harper, TX ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.