Smithton Illinois ZIP Codes
Smithton holds a single ZIP code.
Every ZIP code in Smithton
| ZIP code | County |
|---|---|
| 62285 | St. Clair 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Smithton codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Smithton. 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 Smithton ZIP code begins 622. Those first three digits identify the sectional center facility that processes mail for this part of Illinois. Statewide that range covers 79 ZIP codes, so Smithton accounts for 1% of it.
Every Illinois ZIP prefix and the region it covers →
Area codes covering Smithton
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 Smithton occupies.
Smithton Illinois area codes in full →
Where Smithton's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Smithton
| City | Distance | ZIP codes |
|---|---|---|
| Freeburg Illinois ZIP codes | 4.4 mi | 1 ZIP code |
| Millstadt Illinois ZIP codes | 6.0 mi | 1 ZIP code |
| Belleville Illinois ZIP codes | 7.0 mi | 5 ZIP codes |
| Hecker Illinois ZIP codes | 7.6 mi | 1 ZIP code |
| New Athens Illinois ZIP codes | 9.1 mi | 1 ZIP code |
| Waterloo Illinois ZIP codes | 10 mi | 1 ZIP code |
| O Fallon Illinois ZIP codes | 12 mi | 1 ZIP code |
| Fairview Heights Illinois ZIP codes | 13 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.