🇺🇸 United States ZIP Code

STANDARD

78155

Seguin

ZIP Code 78155 is a standard zip code serving Seguin, Seguin, Texas (TX), in Guadalupe County, United States. It has an estimated population of 45,341 with a median household income of $49,399. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Texas (TX)
County: Guadalupe
City: Seguin
Timezone: America/Chicago

Coordinates

Latitude: 29.561300
Longitude: -97.962800

Geographic Details

Land Area: 354.57 mi²
Water Area: 1.53 mi²
Population Density: 128.0 people per mi² (55th percentile)
Bounding Box: 29.765462°N, 29.377237°S, -97.739639°E, -98.137705°W

With 45,341 residents spread across 354.57 square miles, this area has a population density of 128.0 people per square mile.

Demographics

45,341

Population

95th percentile

$49,399

Median Income

50th percentile

$114,400

Median Home Value

40th percentile

354.57 mi²

Land Area

The median household income in 78155 is $49,399, and the median home value is $114,400.

Housing

18,039

Total Units

16,133

Occupied Units

89.4%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Seguin, TX.

78156

Seguin

Similar ZIP Codes in Texas

ZIP codes with similar median household income in Texas.

76431

Chico

$51,941

77063

Houston

$49,873

77455

Louise

$50,000

75252

Dallas

$54,650

78022

George West

$43,924

77482

Van Vleck

$51,887

77964

Hallettsville

$42,349

76458

Jacksboro

$49,306

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.