Round Mountain Texas ZIP Codes
Round Mountain holds a single ZIP code.
Every ZIP code in Round Mountain
| ZIP code | County |
|---|---|
| 78663 | Blanco 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Round Mountain codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Round Mountain. 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 Round Mountain ZIP code begins 786. Those first three digits identify the sectional center facility that processes mail for this part of Texas. Statewide that range covers 75 ZIP codes, so Round Mountain accounts for 1% of it.
Every Texas ZIP prefix and the region it covers →
Area codes covering Round Mountain
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Round Mountain occupies.
Round Mountain Texas area codes in full →
Where Round Mountain's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Round Mountain
| City | Distance | ZIP codes |
|---|---|---|
| Johnson City Texas ZIP codes | 8.9 mi | 1 ZIP code |
| Horseshoe Bay Texas ZIP codes | 10 mi | 1 ZIP code |
| Marble Falls Texas ZIP codes | 13 mi | 1 ZIP code |
| Blanco Texas ZIP codes | 21 mi | 1 ZIP code |
| Dripping Springs Texas ZIP codes | 21 mi | 1 ZIP code |
| Burnet Texas ZIP codes | 26 mi | 1 ZIP code |
| Bertram Texas ZIP codes | 30 mi | 1 ZIP code |
| Llano Texas ZIP codes | 31 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.