Seguin Texas ZIP Codes
Seguin holds 2 ZIP codes, all inside one county and one postal prefix.
Every ZIP code in Seguin
| ZIP code | County |
|---|---|
| 78155 | Guadalupe County |
| 78156 | Guadalupe County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Seguin codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Seguin. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Seguin ZIP code begins 781. Those first three digits identify the sectional center facility that processes mail for this part of Texas. Statewide that range covers 46 ZIP codes, so Seguin accounts for 4% of it.
Every Texas ZIP prefix and the region it covers →
Area codes covering Seguin
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Seguin occupies.
Seguin Texas area codes in full →
Where Seguin's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Seguin
| City | Distance | ZIP codes |
|---|---|---|
| Kingsbury Texas ZIP codes | 9.9 mi | 1 ZIP code |
| Marion Texas ZIP codes | 11 mi | 1 ZIP code |
| New Braunfels Texas ZIP codes | 12 mi | 4 ZIP codes |
| Staples Texas ZIP codes | 15 mi | 1 ZIP code |
| Cibolo Texas ZIP codes | 15 mi | 1 ZIP code |
| Schertz Texas ZIP codes | 17 mi | 1 ZIP code |
| La Vernia Texas ZIP codes | 19 mi | 1 ZIP code |
| Martindale Texas ZIP codes | 19 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.