Caledonia Missouri ZIP Codes
Caledonia holds a single ZIP code.
Every ZIP code in Caledonia
| ZIP code | County |
|---|---|
| 63631 | Washington 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Caledonia codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Caledonia. 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 Caledonia ZIP code begins 636. Those first three digits identify the sectional center facility that processes mail for this part of Missouri. Statewide that range covers 37 ZIP codes, so Caledonia accounts for 3% of it.
Every Missouri ZIP prefix and the region it covers →
Area codes covering Caledonia
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 Caledonia occupies.
Caledonia Missouri area codes in full →
Where Caledonia's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Caledonia
| City | Distance | ZIP codes |
|---|---|---|
| Irondale Missouri ZIP codes | 7.5 mi | 1 ZIP code |
| Bismarck Missouri ZIP codes | 8.2 mi | 1 ZIP code |
| Potosi Missouri ZIP codes | 12 mi | 1 ZIP code |
| Pilot Knob Missouri ZIP codes | 12 mi | 1 ZIP code |
| Leadwood Missouri ZIP codes | 12 mi | 1 ZIP code |
| Mineral Point Missouri ZIP codes | 13 mi | 1 ZIP code |
| Ironton Missouri ZIP codes | 14 mi | 1 ZIP code |
| Arcadia Missouri ZIP codes | 15 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.