ZIP CodesZIP codes in Madison County, Missouri
Madison County, Missouri has 2 ZIP codes in this list, from 63645 to 63655. They cover 2 places, among them Fredericktown and Marquand.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 63645 | Fredericktown | 359 | 37.491, -90.336 |
| 63655 | Marquand | 152 | 37.427, -90.174 |
The ZIP code areas of Madison County add up to about 511 square miles of land (1,324 sq km) as the Census Bureau draws them. The largest is 63645 (Fredericktown), with 359 square miles.
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Fredericktown, MO 63645.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.