78405 ZIP Code: San Augustine, Texas
Official postal information, geographic coordinates, USPS post office locations, and US Census Bureau demographic metrics for postal code 78405 in San Augustine, TX.
Postal & Geographic Specifications USPS Data
Demographic & Economic Profile (US Census Bureau)
American Community Survey (ACS) 5-Year Verified Metrics
Editor's Neighborhood Insight & Local Context
78405 is an active postal delivery zone serving San Augustine in San Augustine 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
Mon-Fri 8:30 AM - 5:00 PM; Sat 9:00 AM - 1:00 PM; Sun Closed
Geographic Map & Coordinates
34.6000, -99.3000Adjacent & Contiguous ZIP Codes
Nearby postal codes bordering 78405 in San Augustine
Frequently Asked Questions About 78405 (San Augustine, TX)
What county is ZIP code 78405 located in for tax and voter purposes? ▾
ZIP code 78405 is located within San Augustine County, Texas. The official county seat is San Augustine, and the primary jurisdiction carries Texas FIPS code 48405.
What is the 4-digit ZIP+4 code for 78405? ▾
The full 9-digit postal code format is 78405-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 78405 is fully valid, while specific ZIP+4 extensions can be verified with USPS address validation.
Where is the nearest USPS post office for 78405 and what are the lobby hours? ▾
The primary USPS facility serving 78405 is USPS Post Office - San Augustine, located at 100 Main St, San Augustine, TX 78405. 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 78405? ▾
ZIP code 78405 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 78405? ▾
According to U.S. Census Bureau ACS data, ZIP code 78405 in San Augustine has an estimated population of 3,167 residents and a median household income of $80,640 per year (compared to the Texas state median of $74,640).
What postal codes border 78405 in San Augustine? ▾
Adjacent and contiguous ZIP codes bordering 78405 include 78005 (Lufkin, ~0 mi), 78105 (Ozona, ~0 mi), 78305 (Tahoka, ~0 mi), 78505 (Zapata, ~0 mi).