Hannibal Missouri ZIP Codes
Hannibal holds a single ZIP code.
Every ZIP code in Hannibal
| ZIP code | County |
|---|---|
| 63401 | Marion 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Hannibal codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Hannibal. 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 Hannibal ZIP code begins 634. Those first three digits identify the sectional center facility that processes mail for this part of Missouri. Statewide that range covers 42 ZIP codes, so Hannibal accounts for 2% of it.
Every Missouri ZIP prefix and the region it covers →
Area codes covering Hannibal
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 Hannibal occupies.
Hannibal Missouri area codes in full →
Where Hannibal's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Hannibal
| City | Distance | ZIP codes |
|---|---|---|
| New London Missouri ZIP codes | 8.7 mi | 1 ZIP code |
| Palmyra Missouri ZIP codes | 9.3 mi | 1 ZIP code |
| Frankford Missouri ZIP codes | 16 mi | 1 ZIP code |
| Center Missouri ZIP codes | 16 mi | 1 ZIP code |
| Monroe City Missouri ZIP codes | 18 mi | 1 ZIP code |
| Perry Missouri ZIP codes | 24 mi | 1 ZIP code |
| La Grange Missouri ZIP codes | 24 mi | 1 ZIP code |
| Hunnewell Missouri ZIP codes | 25 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.