Castroville Texas ZIP Codes
Castroville holds a single ZIP code.
Every ZIP code in Castroville
| ZIP code | County |
|---|---|
| 78009 | Medina 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Castroville codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Castroville. 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 Castroville ZIP code begins 780. Those first three digits identify the sectional center facility that processes mail for this part of Texas. Statewide that range covers 59 ZIP codes, so Castroville accounts for 2% of it.
Every Texas ZIP prefix and the region it covers →
Area codes covering Castroville
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 Castroville occupies.
Castroville Texas area codes in full →
Where Castroville's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Castroville
| City | Distance | ZIP codes |
|---|---|---|
| Lytle Texas ZIP codes | 9.4 mi | 1 ZIP code |
| Natalia Texas ZIP codes | 12 mi | 1 ZIP code |
| Von Ormy Texas ZIP codes | 13 mi | 1 ZIP code |
| Somerset Texas ZIP codes | 15 mi | 1 ZIP code |
| Devine Texas ZIP codes | 15 mi | 1 ZIP code |
| Helotes Texas ZIP codes | 18 mi | 1 ZIP code |
| Hondo Texas ZIP codes | 19 mi | 1 ZIP code |
| San Antonio Texas ZIP codes | 21 mi | 83 ZIP codes |
Straight-line distance between place reference points, not driving distance.