ZIP Code 78155
standardSource:
Seguin · Guadalupe County · Texas
- Population
- 45,341
- Median income
- $71,039
- Median home value
- $266,700
- Bachelor's or higher
- 21.7%
- Land area
- 917.8 sq mi
49/sq mi
▼ 7% vs US
higher than 48% of US ZIPs
▼ 4% vs US
higher than 61% of US ZIPs
Median age 39.4
Chicago
ZIP code 78155 in Seguin, Texas has a population of 45,341. The median household income is $71,039, which is 7% below the national average. Median home value is $266,700, 4% below the US average. 21.7% of residents hold a bachelor's degree or higher.
ZIP code 78155 is classified by USPS as a standard delivery area and covers roughly 917.8 square miles in Seguin, Guadalupe County, Texas. The area is home to 45,341 residents, producing a population density of 49 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 78155 against Texas and the nation.
On the economic side, the median household income for ZIP 78155 sits at $71,039 (6% below the Texas average), while per-capita income is $36,571. The poverty rate stands at 16.9% and the unemployment rate at 3.9%. On housing, the median home value is $266,700 (8% above the state average) with median rent at $1,198 per month, and 72.5% of occupied units are owner-occupied, a direct signal of whether 78155 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 21.7% of adults hold a bachelor's degree or higher, the median age is 39.4, and the average commute is 27 minutes. We also surface 2 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Guadalupe County, so you can benchmark 78155 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 78155
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 78155.
- Retail trade
Retail trade
160 establishments
- Construction
Construction
116 establishments
- Health care and social assistance
Health care and social assistance
104 establishments
- Accommodation and food services
Accommodation and food services
104 establishments
- Other services (except public administration)
Other services (except public administration)
104 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 78155, Seguin, 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
45,341
Population
917.8
Area (sq mi)
49
People / sq mi
Chicago
Time Zone
standard
ZIP Type
Who lives in ZIP 78155?
39.4
Median Age
50.1%
Male
49.9%
Female
8.9%
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?
$71,039
Median Household Income
-6% vs state
$36,571
Per Capita Income
16.9%
Poverty Rate
3.9%
Unemployment Rate
26.5 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?
22,688
Total Housing Units
21,007
Occupied Units
1,681
Vacant Units
2.56
Avg Household Size
Occupancy Type
$266,700
Median Home Value
+8% vs state
$1,198
Median Rent
1992
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
+0.1%
YoY Change (2024)
335
HPI Index (2000 = 100)
+235%
Total Change Since 2000
Home values in ZIP 78155 have increased 0.1% over the past year (2024). Since 2000, this ZIP has seen +235% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +2.6% | 228 |
| 2021 | +13.7% | 259 |
| 2022 | +18.5% | 307 |
| 2023 | +8.9% | 335 |
| 2024 | +0.1% | 335 |
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 1,065 business establishments in ZIP 78155, employing approximately 20,490 people with a combined annual payroll of $1,195,648,000.
1,065
Businesses
20,490
Employees
$1.2B
Annual Payroll
19
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Retail trade | 160 | 15.0% |
| Construction | 116 | 10.9% |
| Health care and social assistance | 104 | 9.8% |
| Accommodation and food services | 104 | 9.8% |
| Other services (except public administration) | 104 | 9.8% |
| Manufacturing | 73 | 6.8% |
| Finance and insurance | 73 | 6.8% |
| Professional, scientific, and technical services | 66 | 6.2% |
| Real estate and rental and leasing | 54 | 5.1% |
| Transportation and warehousing | 47 | 4.4% |
| Administrative and support and waste management and remediation services | 44 | 4.1% |
| Wholesale trade | 40 | 3.8% |
| Arts, entertainment, and recreation | 21 | 2.0% |
| Information | 17 | 1.6% |
| Management of companies and enterprises | 16 | 1.5% |
| Educational services | 13 | 1.2% |
| Mining, quarrying, and oil and gas extraction | 4 | 0.4% |
| Industries not classified | 4 | 0.4% |
| Utilities | 3 | 0.3% |
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 78155 vs 78123 →
More ZIP Codes in Guadalupe County
Related Areas
Frequently Asked Questions
What county is ZIP code 78155 in? ▼
What is the population of ZIP code 78155? ▼
What is the median household income in ZIP 78155? ▼
What is the average home value in ZIP 78155? ▼
What is the demographic makeup of ZIP 78155? ▼
How many businesses are in ZIP code 78155? ▼
What are the main industries in ZIP code 78155? ▼
How have home values changed in ZIP code 78155? ▼
What is the education level in ZIP code 78155? ▼
What is the average commute time in ZIP 78155? ▼
What percentage of residents own vs. rent in ZIP 78155? ▼
What is the poverty rate in ZIP code 78155? ▼
ZIP Code Research Guides
Official Data Resources for Seguin, 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.