ZIP Code 78682 – Round Rock, TX
Round Rock, Texas · Williamson County · Central time
| ZIP code | 78682 |
|---|---|
| City | Round Rock |
| State | Texas |
| County | Williamson County |
| Population | Not published (no Census ZIP area) |
| Time zone | Central · local time |
| ZIP type | PO box or unique ZIP (no Census area) |
| Center (lat, long) | 30.6568, -97.6026 |
Area codes in this area
These are the area codes that most often serve ZIP 78682 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.
Map
Nearby ZIP codes
About ZIP 78682
ZIP code 78682 is assigned to Round Rock, Texas. It lies in Williamson County. It is a PO-box-only or single-address ZIP, so the Census Bureau does not publish an area for it; the location shown is approximate. The closest neighboring ZIP is 78680 (Round Rock), about 0 miles away.
Every address in 78682 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.
Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources