Zip Code 78155
Seguin, Texas — Guadalupe County
📍 ZIP code 78155 is in Seguin, Guadalupe County, Texas.
ZIP code 78155 is located in Seguin, Guadalupe County, Texas. It is a zip code in the Central (CST/CDT) Time Zone with an estimated population of 53,449. The area code for ZIP code 78155 is 210.
Quick Answer
Zip code 78155 is in Seguin, Texas (Guadalupe County). It has a population of 53,449, median household income of $71,367, and median home value of $246,000.
Population
53,449
Income
$71,367
Home Value
$246,000
Climate
96°F / 40°F
About Zip Code 78155
Zip code 78155 is located in Seguin, Texas, within Guadalupe County. Home to approximately 53,449 residents, this area sits at an elevation of 475 ft and falls within the Central (CST/CDT) timezone. The local area code is 210.
The median household income is $71,367 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $246,000, and the cost of living index is 83 (17% below the national average of 100).
Summers average a high of 96°F while winters drop to 40°F. The area receives about 35 in of rain annually. The zip code covers 354.4 square miles of land area and 1.5 square miles of water.
Key Statistics
53,449
$71,367
$246,000
Central (CST/CDT)
210
475 ft
354.4 sq mi
39.4
21,791
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Compare With Nearby Zip Codes
| Metric | 78155 | 78123 | 78638 | 78124 | 78130 | 78122 |
|---|---|---|---|---|---|---|
| City | Seguin, TX | Mc Queeney, TX | Kingsbury, TX | Marion, TX | New Braunfels, TX | Leesville, TX |
| Population | 53,449 | 2,271 | 2,064 | 6,907 | 95,787 | 313 |
| Median Income | $71,367 | $95,700 | $82,760 | $82,534 | $84,426 | $91,776 |
| Home Value | $246,000 | $238,900 | $301,500 | $282,000 | $296,300 | $257,900 |
| Cost of Living | 83 | 92 | 74 | 93 | 103 | 134 |
| Median Age | 39.4 | 46.9 | 43.9 | 43 | 35.9 | 69 |
Cost of Living
100 = National Average. Seguin's cost of living is 17% below the national average.
vs. State Avg
Below
Affordability
Affordable
Income-to-Home
3.4x
Demographics
Zip code 78155 has a population of 53,449 people with a median age of 39.4. There are 21,791 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Seguin (78155) population trend from 2010 to 2024
↑ 53349.0%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
96°F
40°F
35 in
0 in
Seguin experiences hot summers with average highs around 96°F. Winters are mild with lows averaging 40°F. The area receives virtually no snowfall.
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Housing & Economy
Median Home Value
$246,000
Median Household Income
$71,367
With 21,791 housing units across 354.4 square miles, 78155 has a housing density of 61 units per square mile. The home price-to-income ratio is 3.4x.
Location & Geography
Latitude
29.5430°
Longitude
-97.9377°
Land Area
354.4 sq mi
Water Area
1.5 sq mi
Nearby Zip Codes
Zip codes closest to 78155 (Seguin, TX) with distances:
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ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 78155's $71,367. A way to compare Seguin to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 78155 (Seguin, TX). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Seguin, Texas?
Seguin, Texas uses zip code 78155.
What county is zip code 78155 in?
Zip code 78155 is located in Guadalupe County, Texas.
What is the population of zip code 78155?
The population of zip code 78155 is 53,449 with a median age of 39.4.
Is 78155 in Seguin, Texas?
Yes, zip code 78155 is in Seguin, Guadalupe County, Texas. The area code is 210.
Frequently Asked Questions
What city is zip code 78155 in?
Zip code 78155 is in Seguin, Texas. It is part of Guadalupe County and uses the Central (CST/CDT) timezone.
What is zip code 78155?
Zip code 78155 is a U.S. postal code in Seguin, Texas (Guadalupe County). It has a population of 53,449 and covers 354.4 square miles.
What is the population of zip code 78155?
The population of zip code 78155 (Seguin, TX) is 53,449 with a median age of 39.4. There are approximately 21,791 housing units in this area.
What is the median income in zip code 78155?
The median household income in zip code 78155 (Seguin, TX) is $71,367 per year. The cost of living index is 83 (100 = national average).
What is the average home price in zip code 78155?
The median home value in zip code 78155 (Seguin, TX) is $246,000. The cost of living index is 83 compared to the national average of 100.
What county is zip code 78155 in?
Zip code 78155 is located in Guadalupe County, Texas. The primary city is Seguin.
What is the area code for zip code 78155?
Zip code 78155 in Seguin, TX uses area code 210. It is located in the Central (CST/CDT) timezone.
Is zip code 78155 a good place to live?
Zip code 78155 (Seguin, TX) has a cost of living index of 83 (100 = national average), a median household income of $71,367, and median home values of $246,000. The median age is 39.4. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 78155?
The cost of living index for zip code 78155 (Seguin, TX) is 83, where 100 represents the national average. This area is below the national average. Median home value: $246,000.
What schools serve zip code 78155?
Zip code 78155 in Seguin, Texas is served by the local school district of Guadalupe County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.