Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/TX/SAN-DIEGO

San Diego ZIP code, Texas

The ZIP code for San Diego, TX is 78384, and its area code is 361.

USPS city name
1 ZIP code
Overlapping the city
1 more
Population
3,675
Area code
361
State
Texas

Mail addressed to San Diego uses the ZIP code above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.

San Diego in numbers

About 3,675 people live in San Diego, in 1,253 households. The median household income is $53,174 a year, 32% below the Texas median of $78,476 (US: $80,734). The median owner-occupied home is valued at $85,600 (70% below the Texas median), and median gross rent is $1,096 a month. The median age is 29.8; 12.1% of adults 25 and over hold a bachelor's degree or higher (33.8% across Texas); the average commute takes 32 minutes.

Population3,675San Diego3,675
Households1,253San Diego1,253
Median age29.8San Diego29.8Texas35.6US 38.9
Median household income$53,174San Diego$53,174Texas$78,476US $80,734
Median home value$85,600San Diego$85,600Texas$283,800US $332,700
Median gross rent$1,096San Diego$1,096Texas$1,403US $1,413
Bachelor's degree or higher12.1%San Diego12.1%Texas33.8%US 35.7%
Mean commute32.1 minSan Diego32.1 minTexas26.7 minUS 26.4 min
Population density1,933 / sq miSan Diego1,933 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place San Diego city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as San Diego

ZIP codes with the USPS city name San Diego
ZIP City Type Population Median income Median home
78384 San Diego , TX Standard 5,747 $47,603 $78,100

Other ZIP codes overlapping San Diego

These ZIP codes cover part of San Diego but are addressed as somewhere else.

ZIP codes overlapping San Diego
ZIP City Type Population Median income Median home
78332 Alice , TX Standard 27,042 $49,887 $107,500

Map of San Diego ZIP codes

78384

The ZIP codes of San Diego, TX, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near San Diego

The nearest larger towns are Alice (17,707 people, 11 mi), Kingsville (24,994 people, 29 mi) and Mathis (4,308 people, 34 mi).

Towns near San Diego
TownPopulationDistance
Alice 17,707 10.6 mi
Kingsville 24,994 28.9 mi
Bishop 3,103 29.6 mi

More nearby: every ZIP code in Duval County · Texas ZIP codes

Cite this page

zipcodes.pro. “San Diego, TX ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/tx/san-diego

Underlying data is public domain or openly licensed — sources, vintages and licences.