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USPS Standard Delivery Code Franklin County →

78159 ZIP Code: Franklin City 79, Texas

Official postal information, geographic coordinates, USPS post office locations, and US Census Bureau demographic metrics for postal code 78159 in Franklin City 79, TX.

Neighborhoods: Mount Vernon Mount Vernon Central

Postal & Geographic Specifications USPS Data

ZIP Code 78159
Primary City Franklin City 79, TX
County Franklin County
Area Code(s) 512, 737
Timezone America/Chicago (CST / CDT)
Land Area 286 sq mi
Elevation 480 ft
Coordinates 31.1000°, -103.7000°

Demographic & Economic Profile (US Census Bureau)

American Community Survey (ACS) 5-Year Verified Metrics

+14% vs Texas Avg
Total Population 4,144 290 people / sq mi
Median Household Income $85,440 Per Capita: $58,150
Median Home Value $577,000 Median Rent: $1,550/mo
Housing Tenancy
62% Own • 38% Rent
1,802 Total Units
Median Household Income Comparison $85,440 (78159) vs. $74,640 (Texas State)

Editor's Neighborhood Insight & Local Context

78159 is an active postal delivery zone serving Mount Vernon in Franklin 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 - Mount Vernon
Physical Address 100 Main St, Mount Vernon, TX 78159
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, -103.7000

Adjacent & Contiguous ZIP Codes

Nearby postal codes bordering 78159 in Franklin City 79

4 Contiguous Areas
78059 ~0 mi

Baird

View 78059 →
78259 ~0 mi

Boerne

View 78259 →
78359 ~0 mi

Vega

View 78359 →
78459 ~0 mi

Gilmer

View 78459 →
Explore Major Texas Metropolitan Regions:
All Texas Metros & Counties →
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Frequently Asked Questions About 78159 (Franklin City 79, TX)

What county is ZIP code 78159 located in for tax and voter purposes? ▾

ZIP code 78159 is located within Franklin County, Texas. The official county seat is Mount Vernon, and the primary jurisdiction carries Texas FIPS code 48159.

What is the 4-digit ZIP+4 code for 78159? ▾

The full 9-digit postal code format is 78159-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 78159 is fully valid, while specific ZIP+4 extensions can be verified with USPS address validation.

Where is the nearest USPS post office for 78159 and what are the lobby hours? ▾

The primary USPS facility serving 78159 is USPS Post Office - Mount Vernon, located at 100 Main St, Mount Vernon, TX 78159. 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 78159? ▾

ZIP code 78159 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 78159? ▾

According to U.S. Census Bureau ACS data, ZIP code 78159 in Mount Vernon has an estimated population of 4,144 residents and a median household income of $85,440 per year (compared to the Texas state median of $74,640).

What postal codes border 78159 in Mount Vernon? ▾

Adjacent and contiguous ZIP codes bordering 78159 include 78059 (Baird, ~0 mi), 78259 (Boerne, ~0 mi), 78359 (Vega, ~0 mi), 78459 (Gilmer, ~0 mi).