PlainZIP

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
$78,560
Median income
$351,600
Median home value
24.0%
Bachelor's or higher

The verdict

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 Texas average), while per-capita income is $35,226. Poverty here runs at 11.1%, with unemployment measured at 0.6%. Housing costs here run $351,600 for a typical home value (42% above the state average), with rent averaging $1,304 a month; 84.2% of homes are owner-occupied.

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 -. To put 78631 in local context, 1 ZIP codes within roughly 10 miles appear further down this page alongside 5 additional ZIPs in Gillespie County, for a geography-aware comparison.

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.

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 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

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 78631?

43.4

Median Age

58.4%

Male

41.6%

Female

4.0%

Foreign-Born

White 73.4%
African American 0.0%
Asian 0.0%
American Indian or Alaska Native 0.1%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 24.8%
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?

$78,560

Median Household Income

+4% vs state

$35,226

Per Capita Income

11.1%

Poverty Rate

0.6%

Unemployment Rate

How ZIP 78631 ranks nationally

Harper, TX household income vs. every US ZIP code

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

$78,560 Top 40% higher than 60% 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%). This entry sits in this band. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $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 60.9%
Bachelor's Degree or Higher 24.0%

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

What does housing look like?

1,571

Total Housing Units

1,269

Occupied Units

302

Vacant Units

2.73

Avg Household Size

Occupancy Type

Owner 84.2%
Renter 15.8%

$351,600

Median Home Value

+42% vs state

$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

More ZIP Codes in Gillespie County

78624 standard
Fredericksburg, TX
Pop: 21,513
78058 standard
Mountain Home, TX
Pop: 1,256
78671 standard
Stonewall, TX
Pop: 654
78618 standard
Doss, TX
Pop: 324
78675 standard
Willow City, TX
Pop: 188

Related Areas

Gillespie County Harper, TX Texas

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.

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