Williamstown ZIP code, Missouri
The ZIP code for Williamstown, MO is 63473, and its area code is 573.
- USPS city name
- 1 ZIP code
- Population
- 23
- Area code
- 573
- County
- Lewis County
- State
- Missouri
ZIP codes addressed as Williamstown
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
63473 | Williamstown , MO | Standard | 375 | $57,174 | $166,300 |
Map of Williamstown ZIP codes
The ZIP codes of Williamstown, MO, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Towns near Williamstown
The nearest larger towns are Monticello (233 people, 9.5 mi), La Belle (775 people, 11 mi) and Lewistown (343 people, 11 mi).
| Town | Population | Distance |
|---|---|---|
| Canton | 2,752 | 16.3 mi |
| Keokuk, IA | 9,662 | 23.9 mi |
| Hamilton, IL | 2,714 | 25.2 mi |
More nearby: every ZIP code in Lewis County · Missouri ZIP codes
Cite this page
zipcodes.pro. “Williamstown, MO ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/mo/williamstown
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