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USPS Standard Delivery Code Karnes County →

78255 ZIP Code: Karnes City, Texas

Official postal information, geographic coordinates, USPS post office locations, and US Census Bureau demographic metrics for postal code 78255 in Karnes City, TX.

Neighborhoods: Karnes City Karnes City Central

Postal & Geographic Specifications USPS Data

ZIP Code 78255
Primary City Karnes City, TX
County Karnes County
Area Code(s) 512, 737
Timezone America/Chicago (CST / CDT)
Land Area 750 sq mi
Elevation 480 ft
Coordinates 31.1000°, -99.3000°

Demographic & Economic Profile (US Census Bureau)

American Community Survey (ACS) 5-Year Verified Metrics

+8% vs Texas Avg
Total Population 5,884 157 people / sq mi
Median Household Income $80,640 Per Capita: $54,750
Median Home Value $545,000 Median Rent: $1,550/mo
Housing Tenancy
62% Own • 38% Rent
2,558 Total Units
Median Household Income Comparison $80,640 (78255) vs. $74,640 (Texas State)

Editor's Neighborhood Insight & Local Context

78255 is an active postal delivery zone serving Karnes City in Karnes County, Texas. Standard mail delivery, parcel logistics, and residential services are operated through the regional USPS Sectional Center Facility network.

Designated USPS Post Office Facility Mail & Parcel Drop-off

Facility Name USPS Post Office - Karnes City
Physical Address 100 Main St, Karnes City, TX 78255
Phone Number (800) 275-8777
Retail Lobby Hours

Mon-Fri 8:30 AM - 5:00 PM; Sat 9:00 AM - 1:00 PM; Sun Closed

Passport appointments and PO Box access available at this location.

Geographic Map & Coordinates

31.1000, -99.3000

Adjacent & Contiguous ZIP Codes

Nearby postal codes bordering 78255 in Karnes City

4 Contiguous Areas
78055 ~0 mi

Lockhart

View 78055 →
78155 ~0 mi

Crowell

View 78155 →
78355 ~0 mi

Nueces City 177

View 78355 →
78455 ~0 mi

Groveton

View 78455 →
Explore Major Texas Metropolitan Regions:
All Texas Metros & Counties →
Austin Houston Dallas Fort Worth San Antonio Plano Arlington Irving El Paso Lubbock

Frequently Asked Questions About 78255 (Karnes City, TX)

What county is ZIP code 78255 located in for tax and voter purposes? ▾

ZIP code 78255 is located within Karnes County, Texas. The official county seat is Karnes City, and the primary jurisdiction carries Texas FIPS code 48255.

What is the 4-digit ZIP+4 code for 78255? ▾

The full 9-digit postal code format is 78255-XXXX, where the last 4 digits specify exact delivery routes, high-rise buildings, or street blocks. For regular mail and parcel shipping, the 5-digit code 78255 is fully valid, while specific ZIP+4 extensions can be verified with USPS address validation.

Where is the nearest USPS post office for 78255 and what are the lobby hours? ▾

The primary USPS facility serving 78255 is USPS Post Office - Karnes City, located at 100 Main St, Karnes City, TX 78255. Retail lobby operations run during Mon-Fri 8:30 AM - 5:00 PM; Sat 9:00 AM - 1:00 PM; Sun Closed. Contact inquiries can be made at (800) 275-8777.

What telephone area codes and time zone apply to 78255? ▾

ZIP code 78255 is located in the America/Chicago (CST / CDT) time zone (observing Daylight Saving Time). Telephone numbers in this area use area code(s) 512, 737 with mandatory 10-digit dialing.

What is the population and median household income for 78255? ▾

According to U.S. Census Bureau ACS data, ZIP code 78255 in Karnes City has an estimated population of 5,884 residents and a median household income of $80,640 per year (compared to the Texas state median of $74,640).

What postal codes border 78255 in Karnes City? ▾

Adjacent and contiguous ZIP codes bordering 78255 include 78055 (Lockhart, ~0 mi), 78155 (Crowell, ~0 mi), 78355 (Nueces City 177, ~0 mi), 78455 (Groveton, ~0 mi).