🇺🇸 United States ZIP Code

STANDARD

78384

San Diego

ZIP Code 78384 is a standard zip code serving San Diego, San Diego, Texas (TX), in Duval County, United States. It has an estimated population of 6,640 with a median household income of $26,542. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Texas (TX)
County: Duval
City: San Diego
Timezone: America/Chicago

Coordinates

Latitude: 27.765400
Longitude: -98.250300

Geographic Details

Land Area: 455.95 mi²
Water Area: 1.52 mi²
Population Density: 15.0 people per mi² (15th percentile)
Bounding Box: 28.057996°N, 27.583118°S, -98.194103°E, -98.623860°W

With 6,640 residents spread across 455.95 square miles, this area has a population density of 15.0 people per square mile.

Demographics

6,640

Population

60th percentile

$26,542

Median Income

5th percentile

$53,900

Median Home Value

5th percentile

455.95 mi²

Land Area

The median household income in 78384 is $26,542, and the median home value is $53,900. This is below the national average for household income.

Housing

2,591

Total Units

2,058

Occupied Units

79.4%

Occupancy Rate

Similar ZIP Codes in Texas

ZIP codes with similar median household income in Texas.

77419

Blessing

$21,857

76859

Menard

$30,833

77022

Houston

$28,810

78237

San Antonio

$26,702

78014

Cotulla

$26,179

78011

Charlotte

$27,941

77078

Houston

$30,368

78852

Eagle Pass

$31,214

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.