Johnston City Illinois ZIP Codes
Johnston City holds a single ZIP code.
Every ZIP code in Johnston City
| ZIP code | County |
|---|---|
| 62951 | Williamson 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Johnston City codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Johnston City. 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 Johnston City ZIP code begins 629. Those first three digits identify the sectional center facility that processes mail for this part of Illinois. Statewide that range covers 83 ZIP codes, so Johnston City accounts for 1% of it.
Every Illinois ZIP prefix and the region it covers →
Area codes covering Johnston City
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 Johnston City occupies.
Johnston City Illinois area codes in full →
Where Johnston City's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Johnston City
| City | Distance | ZIP codes |
|---|---|---|
| Freeman Spur Illinois ZIP codes | 4.7 mi | 1 ZIP code |
| Pittsburg Illinois ZIP codes | 5.3 mi | 1 ZIP code |
| West Frankfort Illinois ZIP codes | 5.4 mi | 1 ZIP code |
| Herrin Illinois ZIP codes | 5.7 mi | 1 ZIP code |
| Marion Illinois ZIP codes | 6.0 mi | 1 ZIP code |
| Energy Illinois ZIP codes | 6.2 mi | 1 ZIP code |
| Orient Illinois ZIP codes | 7.2 mi | 1 ZIP code |
| Colp Illinois ZIP codes | 8.2 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.