78187 ZIP Code: Seguin, Texas
Official postal information, geographic coordinates, USPS post office locations, and US Census Bureau demographic metrics for postal code 78187 in Seguin, 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
78187 is an active postal delivery zone serving Seguin in Guadalupe 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
33.2000, -101.5000Adjacent & Contiguous ZIP Codes
Nearby postal codes bordering 78187 in Seguin
Frequently Asked Questions About 78187 (Seguin, TX)
What county is ZIP code 78187 located in for tax and voter purposes? ▾
ZIP code 78187 is located within Guadalupe County, Texas. The official county seat is Seguin, and the primary jurisdiction carries Texas FIPS code 48187.
What is the 4-digit ZIP+4 code for 78187? ▾
The full 9-digit postal code format is 78187-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 78187 is fully valid, while specific ZIP+4 extensions can be verified with USPS address validation.
Where is the nearest USPS post office for 78187 and what are the lobby hours? ▾
The primary USPS facility serving 78187 is USPS Post Office - Seguin, located at 100 Main St, Seguin, TX 78187. 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 78187? ▾
ZIP code 78187 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 78187? ▾
According to U.S. Census Bureau ACS data, ZIP code 78187 in Seguin has an estimated population of 69,082 residents and a median household income of $89,040 per year (compared to the Texas state median of $74,640).
What postal codes border 78187 in Seguin? ▾
Adjacent and contiguous ZIP codes bordering 78187 include 76087 (Hudson Oaks, ~0 mi), 78087 (Wellington, ~0 mi), 78287 (Giddings, ~0 mi), 78387 (Clarksville, ~0 mi).