Hamilton Missouri ZIP Codes
Hamilton holds a single ZIP code.
Every ZIP code in Hamilton
| ZIP code | County |
|---|---|
| 64644 | Caldwell 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Hamilton codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Hamilton. 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 Hamilton ZIP code begins 646. Those first three digits identify the sectional center facility that processes mail for this part of Missouri. Statewide that range covers 55 ZIP codes, so Hamilton accounts for 2% of it.
Every Missouri ZIP prefix and the region it covers →
Area codes covering Hamilton
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 Hamilton occupies.
Hamilton Missouri area codes in full →
Where Hamilton's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Hamilton
| City | Distance | ZIP codes |
|---|---|---|
| Kidder Missouri ZIP codes | 5.9 mi | 1 ZIP code |
| Kingston Missouri ZIP codes | 7.2 mi | 1 ZIP code |
| Breckenridge Missouri ZIP codes | 11 mi | 1 ZIP code |
| Altamont Missouri ZIP codes | 11 mi | 1 ZIP code |
| Winston Missouri ZIP codes | 11 mi | 1 ZIP code |
| Gallatin Missouri ZIP codes | 12 mi | 1 ZIP code |
| Cameron Missouri ZIP codes | 12 mi | 1 ZIP code |
| Cowgill Missouri ZIP codes | 13 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.