ZIP CodesZIP codes in Sullivan County, Missouri
Sullivan County, Missouri has 8 ZIP codes in this list, from 63544 to 64667. They cover 8 places, among them Green Castle, Green City, Milan and Pollock.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 63544 | Green Castle | 139 | 40.270, -92.878 |
| 63545 | Green City | 103 | 40.260, -92.953 |
| 63556 | Milan | 242 | 40.184, -93.136 |
| 63560 | Pollock | 37.6 | 40.339, -93.112 |
| 63566 | Winigan | 19.5 | 40.037, -92.930 |
| 64645 | Harris | 71.7 | 40.307, -93.350 |
| 64646 | Humphreys | 48.6 | 40.114, -93.302 |
| 64667 | Newtown | 76.6 | 40.361, -93.307 |
The ZIP code areas of Sullivan County add up to about 737 square miles of land (1,910 sq km) as the Census Bureau draws them. The largest is 63556 (Milan), with 242 square miles.
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Green Castle, MO 63544.
- 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.