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🇺🇸 United States ZIP Code

STANDARD

78233

San Antonio

ZIP Code 78233 is a standard zip code serving San Antonio, San Antonio, Texas (TX), in Bexar County, United States. It has an estimated population of 43,710 with a median household income of $54,399. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

$0 National: $37,585 $150K+ $54,399

Location

State / Province
Texas (TX)
County
Bexar
Timezone
America/Chicago

Coordinates

Latitude
29.556300
Longitude
-98.364300

Geographic Details

Land Area
13.13 mi²
Water Area
0.10 mi²
Population Density
3328.0 people per mi² (90th percentile)
Bounding Box
29.591840°N, 29.520900°S, -98.315351°E, -98.411047°W

With 43,710 residents spread across 13.13 square miles, this area has a population density of 3328.0 people per square mile.

Demographics

43,710

Population

95th percentile

$54,399

Median Income

60th percentile

$110,400

Median Home Value

40th percentile

13.13 mi²

Land Area

The median household income in 78233 is $54,399, and the median home value is $110,400.

Housing

17,406

Total Units

16,380

Occupied Units

94.1%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in San Antonio, TX.

Similar ZIP Codes in Texas

ZIP codes with similar median household income in Texas.

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.