| City: | Seguin, Texas |
| County: | Guadalupe County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 9:47:27 AM |
| Population: | No Population Data |
| Area Code: | 830 |
| Classification: | PO Box |
| Coordinates: | 29.5687, -97.9644 |
| Quick Link: |
ZIP code 78156 is a PO Box ZIP serving downtown Seguin, Texas, in Guadalupe County. This isn't a territorial ZIP. It's a point location representing the Seguin post office, which sits within the boundaries of 78155.
The post office maintains 712 PO Boxes and serves 335 business delivery points. The only street address in this ZIP is W Court St, where the post office building stands. Those 116 "street" records are actually PO Box Street Addressing (PBSA) entries. They let customers use the post office's physical address with a unit number instead of a traditional PO Box format. Both addressing styles deliver to the same box.
Seguin's downtown post office functions as a PO Box hub for the broader community. While 78155 handles residential street delivery across the city, 78156 concentrates the region's PO Box services. With 712 boxes available, it's a sizable facility for a Texas city of about 30,000 people. Businesses find PO Boxes useful for a consistent mailing address, and 335 local businesses use this location.
The single street address is the post office building location, used for PO Box Street Addressing.
ZIP Code 78156 supports both business and residential activity. According to the Business Census (2024), there are 15 business establishments, employing about 286 people with an annual payroll of $17,907,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 10,516Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 15Source: CBP |
| 1st Quarter Payroll: | $2,629,000Source: CBP |
| Annual Payroll: | $17,907,000Source: CBP |
| # of Employees: | 286Source: CBP |
ZIP Code 78156 is located in Guadalupe County, Texas, within the San Antonio-New Braunfels, TX Metropolitan Statistical Area (CBSA 41700) and Texas's 15th Congressional District. This Metro area has a population of 2,142,508 people, about 0.00% of whom live in ZIP Code 78156. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | San Antonio-New Braunfels, TXSource: Census |
| CBSA Number: | 41700Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 2,142,508Source: Census |
| MSA: | San Antonio, TX MSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 15Source: USPS |
| Congressional Land Area: | 7804.07 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 4866644Source: Census |
| Place Name: | Seguin city; TexasSource: Census |
We could not locate which school district 78156 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on March 1, 2026.