78155 ZIP Code — Seguin, TX
Guadalupe County, Texas
ZIP code 78155 is located in Seguin, Texas, within Guadalupe County. It covers approximately 355.46 square miles and serves a population of 52,295 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 830.
About ZIP code 78155
The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 1990s, giving the area an established character. Median home value is $216,300. Owner-occupancy sits near the national average at 71%.
Median household income is $68,430. 32% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is management, business, and professional, with manufacturing as the leading industry. The average commute of 25 minutes is near the national average.
College attainment at 20% is below the national average, consistent with a trades and production-oriented local economy.
16% of residents lack health insurance, above the national average.
52,295
population
355.46
sq mi land
Standard
ZIP type
Central (CT)
timezone
78155 ZIP code map
Cities in ZIP code 78155
Below are the cities the US Postal Service accepts for ZIP code 78155. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Seguin | Acceptable |
| Seguin | Preferred |
Nearby ZIP codes
78123 Mc Queeney (6.8 mi)
78638 Kingsbury (8.8 mi)
78130 New Braunfels (12.3 mi)
78124 Marion (12.4 mi)
78124 Marion (12.4 mi)
78135 New Braunfels (14.5 mi)
78121 La Vernia (15.8 mi)
78122 Leesville (15.9 mi)
78108 Cibolo (17.1 mi)
78108 Cibolo (17.1 mi)
78655 Martindale (17.8 mi)
78140 Nixon (18.1 mi)
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 52,295 |
| Population density | 147 / sq mi |
| State FIPS | 48 |
| County FIPS | 187 |
| Geography | |
|---|---|
| Land area | 355.46 sq mi |
| Water area | 1.48 sq mi |
| Latitude | 29.5696 |
| Longitude | -97.9385 |
| Timezone | Central (CT) |
| Area code | 830 |
Total population by age
Gender
Race & ethnicity
Economics
updated 06/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 41.9% | 29.3% | 39.5% |
| $50k – $100k | 33.7% | 34.9% | 30.1% |
| $100k – $200k | 19.6% | 29.5% | 22.6% |
| Over $200k | 4.8% | 6.3% | 7.8% |
Demographics & statistics
52,295
Population
147
People per sq mi
37.5
Median age
$68,430
Median household income
$32,847
Per capita income
$216,300
Median home value
$1,083
Median monthly rent
71.1%
Home ownership
16.7%
Poverty rate
3.9%
Unemployment
15,526
Housing units
20.3%
Bachelor's or higher
Age distribution
Male
Female
1,487
Under 5
1,532
1,573
5–9
1,622
1,518
10–14
1,565
1,895
15–19
1,954
1,791
20–24
1,847
3,628
25–34
3,741
3,153
35–44
3,250
2,988
45–54
3,080
1,664
55–59
1,715
1,635
60–64
1,685
2,518
65–74
2,596
1,418
75–84
1,462
482
85+
496
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 11,400 | 21.8% |
| 18 and over | 40,895 | 78.2% |
| 65 and over | 8,972 | 17.2% |
| Median age | 37.5 years | |
Race & ethnicity
White
49.8%
Hispanic or Latino
21.7%
Two or more races
15.9%
Other race
7.1%
Black or African American
4.3%
Asian
0.7%
American Indian / Alaska Native
0.3%
Native Hawaiian / Pacific Islander
0.1%
| Group | Count | % |
|---|---|---|
| White | 33,275 | 49.8% |
| Hispanic or Latino | 14,480 | 21.7% |
| Two or more races | 10,634 | 15.9% |
| Other race | 4,747 | 7.1% |
| Black or African American | 2,898 | 4.3% |
| Asian | 483 | 0.7% |
| American Indian / Alaska Native | 220 | 0.3% |
| Native Hawaiian / Pacific Islander | 38 | 0.1% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 41.9% | 29.3% | 39.5% |
| $50k – $100k | 33.7% | 34.9% | 30.1% |
| $100k – $200k | 19.6% | 29.5% | 22.6% |
| Over $200k | 4.8% | 6.3% | 7.8% |
Under $10k
4.5%
$10k–$15k
4.5%
$15k–$25k
6.8%
$25k–$35k
11.3%
$35k–$50k
10.5%
$50k–$75k
16.8%
$75k–$100k
13.2%
$100k–$150k
18.3%
$150k–$200k
7.0%
$200k+
7.2%
| Range | % of households |
|---|---|
| Under $10k | 4.5% |
| $10k–$15k | 4.5% |
| $15k–$25k | 6.8% |
| $25k–$35k | 11.3% |
| $35k–$50k | 10.5% |
| $50k–$75k | 16.8% |
| $75k–$100k | 13.2% |
| $100k–$150k | 18.3% |
| $150k–$200k | 7.0% |
| $200k+ | 7.2% |
| Median income | $68,430 |
Housing
Home values
Under $50k
10.5%
$50k–$100k
10.7%
$100k–$150k
11.5%
$150k–$200k
12.5%
$200k–$300k
23.9%
$300k–$500k
20.5%
$500k–$1M
8.5%
$1M+
1.9%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $216,300 |
| Median rent / month | $1,083 |
| Owner occupied | 71.1% |
| Renter occupied | 28.9% |
| Vacant | 9.5% |
| Single-family detached | 65.3% |
| Large apartment buildings | 1.6% |
| Mobile homes | 20.8% |
| Median rooms | 5.3 |
| Avg household size (owned) | 2.71 |
Year built
| Era | % |
|---|---|
| 2020 or later | 1.4% |
| 2010–2019 | 15.0% |
| 2000–2009 | 14.8% |
| 1990–1999 | 17.9% |
| 1980–1989 | 14.5% |
| 1970–1979 | 13.2% |
| 1960–1969 | 6.7% |
| 1950–1959 | 9.4% |
| 1940–1949 | 3.5% |
| 1939 or earlier | 3.6% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 2.1% |
| 1 bedroom | 8.3% |
| 2 bedrooms | 23.7% |
| 3 bedrooms | 48.1% |
| 4 bedrooms | 14.5% |
| 5+ bedrooms | 3.3% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 5.4% |
| 1 vehicle | 27.7% |
| 2 vehicles | 38.1% |
| 3 or more | 28.8% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 14.2% |
| Electricity | 80.2% |
| Propane / LP gas | 3.7% |
| Wood | 0.7% |
| Solar | 0.5% |
| No fuel used | 0.6% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 8,923 | 46.9% |
| Cohabiting couple | 2,239 | 11.8% |
| Male householder, no spouse | 3,208 | 16.9% |
| Female householder, no spouse | 4,643 | 24.4% |
| Households with children under 18 | 6,059 | 31.9% |
| Households with seniors (65+) | 6,087 | 32.0% |
| Average household size | 2.67 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 37.6% | 29.2% |
| Married | 45.6% | 46.7% |
| Separated | 2.1% | 3.6% |
| Widowed | 3.9% | 7.4% |
| Divorced | 10.7% | 13.2% |
Education
Less than 9th grade
7.0%
Some HS, no diploma
9.2%
HS graduate
38.8%
Some college, no degree
18.0%
Associate's degree
6.7%
Bachelor's degree
14.0%
Graduate / professional
6.2%
| Metric | % |
|---|---|
| HS diploma or higher | 83.7% |
| Bachelor's or higher | 20.3% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 712 | 5.9% |
| Kindergarten | 535 | 4.5% |
| Elementary school | 4,648 | 38.8% |
| High school | 3,314 | 27.7% |
| College / grad school | 2,759 | 23.1% |
Employment
Industry of employment
Manufacturing
18.5%
Education & healthcare
17.0%
Retail trade
12.3%
Professional & management
9.8%
Arts, food & hospitality
9.2%
Construction
8.7%
Transportation & utilities
6.3%
Finance & real estate
4.3%
Public administration
4.2%
Other services
3.8%
Agriculture & mining
2.6%
Wholesale trade
2.5%
Information
0.7%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 27.1% |
| Service | 16.8% |
| Sales & office | 23.5% |
| Natural resources & construction | 12.4% |
| Production & transportation | 20.2% |
Employment type
| Type | % |
|---|---|
| Private sector | 79.2% |
| Government | 12.6% |
| Self-employed | 8.1% |
| Unpaid family workers | 0.2% |
Commute
| Method | % |
|---|---|
| Drive alone | 79.9% |
| Carpool | 9.3% |
| Public transit | 0.2% |
| Walk | 1.4% |
| Work from home | 7.7% |
| Other means | 1.5% |
| Avg commute (minutes) | 24.5 |
Poverty
All people
16.7%
Under 18 years
28.2%
18 and over
13.4%
Married-couple families
6.4%
Female-led households
32.5%
Income support
| Source | % of households |
|---|---|
| Social Security | 31.9% |
| Retirement income | 22.9% |
| Supplemental Security | 5.4% |
| Cash public assistance | 1.5% |
| Food stamps / SNAP | 16.0% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 40.3% |
| High blood pressure | 35.4% |
| High cholesterol | 34.9% |
| Diabetes | 13.3% |
| Heart disease | 7.2% |
| Stroke | 3.4% |
| Asthma | 9.3% |
| Arthritis | 24.1% |
| Kidney disease | 3.3% |
| Pulmonary disease | 7.3% |
| Cancer | 6.2% |
| Behavior / access | % |
|---|---|
| Smoking | 18.4% |
| Binge drinking | 17.0% |
| No physical activity | 30.5% |
| Less than 7 hrs sleep | 35.9% |
| Depression | 21.4% |
| Fair or poor health | 20.3% |
| Poor mental health | 15.4% |
| Poor physical health | 12.6% |
| No health insurance | 31.9% |
| Visited doctor (checkup) | 72.4% |
| Visited dentist | 51.1% |
| Cholesterol screening | 88.1% |
| Teeth loss | 16.9% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 3,329 | 8.1% |
| Disability | % |
|---|---|
| Any disability | 16.0% |
| Under 18 | 6.9% |
| 18–64 years | 12.8% |
| 65 and over | 39.8% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 60.2% |
| Public insurance | 35.4% |
| No insurance | 15.7% |
| Uninsured under 19 | 10.3% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 49,276 | 94.2% |
| Spanish | 4,360 | 8.8% |
| Other Indo-European | 3,819 | 7.8% |
| Asian & Pacific Islander | 133 | 0.3% |
| Other languages | 231 | 0.5% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 48,077 | 91.9% |
| Born in same state | 47,512 | 90.9% |
| Born in different state | 39,073 | 74.7% |
| Foreign born | 565 | 1.1% |
| Naturalized citizen | 4,218 | 8.1% |
| Not a US citizen | 1,555 | 36.9% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| French | 3,222 | 6.2% |
| Italian | 3,019 | 5.8% |
| Arab | 2,007 | 3.8% |
| Polish | 279 | 0.5% |
| English | 203 | 0.4% |
| Ancestry | Count | % |
|---|---|---|
| Dutch | 118 | 0.2% |
| German | 62 | 0.1% |
| Norwegian | 8 | 0% |
| Irish | 5 | 0% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 36.4% |
| Internet access | 93.0% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 78155
What part of Seguin is ZIP code 78155?
ZIP code 78155 covers a portion of Seguin, Texas, within Guadalupe County.
What county is ZIP code 78155 in?
ZIP code 78155 falls within Guadalupe County, Texas.
What is the poverty rate in ZIP code 78155?
17% of residents in ZIP code 78155 live below the poverty line, above the national average.
What is the population of ZIP code 78155?
ZIP code 78155 has an estimated population of 52,295 residents, with a density of 147 people per square mile.
What is the typical home value in ZIP code 78155?
The median home value in ZIP code 78155 is $216,300.
What is the median household income in ZIP code 78155?
The median household income in ZIP code 78155 is $68,430, below the national median of ~$75,000.
What timezone is ZIP code 78155 in?
ZIP code 78155 observes the CST timezone.