78333 ZIP Code: Mills City 166, Texas
Official postal information, geographic coordinates, USPS post office locations, and US Census Bureau demographic metrics for postal code 78333 in Mills City 166, 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
78333 is an active postal delivery zone serving Goldthwaite in Mills 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
29.7000, -97.1000Adjacent & Contiguous ZIP Codes
Nearby postal codes bordering 78333 in Mills City 166
Frequently Asked Questions About 78333 (Mills City 166, TX)
What county is ZIP code 78333 located in for tax and voter purposes? ▾
ZIP code 78333 is located within Mills County, Texas. The official county seat is Goldthwaite, and the primary jurisdiction carries Texas FIPS code 48333.
What is the 4-digit ZIP+4 code for 78333? ▾
The full 9-digit postal code format is 78333-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 78333 is fully valid, while specific ZIP+4 extensions can be verified with USPS address validation.
Where is the nearest USPS post office for 78333 and what are the lobby hours? ▾
The primary USPS facility serving 78333 is USPS Post Office - Goldthwaite, located at 100 Main St, Goldthwaite, TX 78333. 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 78333? ▾
ZIP code 78333 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 78333? ▾
According to U.S. Census Bureau ACS data, ZIP code 78333 in Goldthwaite has an estimated population of 1,782 residents and a median household income of $84,240 per year (compared to the Texas state median of $74,640).
What postal codes border 78333 in Goldthwaite? ▾
Adjacent and contiguous ZIP codes bordering 78333 include 78033 (Gail, ~0 mi), 78133 (Eastland, ~0 mi), 78233 (Stinnett, ~0 mi), 78433 (Aspermont, ~0 mi).