78409 ZIP Code: Sinton, Texas
Official postal information, geographic coordinates, USPS post office locations, and US Census Bureau demographic metrics for postal code 78409 in Sinton, 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
78409 is an active postal delivery zone serving Sinton in San Patricio 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, -103.7000Adjacent & Contiguous ZIP Codes
Nearby postal codes bordering 78409 in Sinton
Frequently Asked Questions About 78409 (Sinton, TX)
What county is ZIP code 78409 located in for tax and voter purposes? ▾
ZIP code 78409 is located within San Patricio County, Texas. The official county seat is Sinton, and the primary jurisdiction carries Texas FIPS code 48409.
What is the 4-digit ZIP+4 code for 78409? ▾
The full 9-digit postal code format is 78409-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 78409 is fully valid, while specific ZIP+4 extensions can be verified with USPS address validation.
Where is the nearest USPS post office for 78409 and what are the lobby hours? ▾
The primary USPS facility serving 78409 is USPS Post Office - Sinton, located at 100 Main St, Sinton, TX 78409. 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 78409? ▾
ZIP code 78409 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 78409? ▾
According to U.S. Census Bureau ACS data, ZIP code 78409 in Sinton has an estimated population of 26,707 residents and a median household income of $85,440 per year (compared to the Texas state median of $74,640).
What postal codes border 78409 in Sinton? ▾
Adjacent and contiguous ZIP codes bordering 78409 include 75109 (Mustang, ~0 mi), 78009 (Archer City, ~0 mi), 78109 (Culberson City 54, ~0 mi), 78309 (McLennan City 160, ~0 mi).