100 Smallest ZIP Codes in the United States by Population in St. Charles County, Missouri
Explore the 100 smallest ZIP codes in the United States ranked by population using U.S. Census demographic data. This page lists ZIP codes located in St. Charles County, Missouri.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 63365 | NEW MELLE | MO | 66 |
| 2 | 63386 | WEST ALTON | MO | 522 |
| 3 | 63373 | PORTAGE DES SIOUX | MO | 687 |
| 4 | 63332 | AUGUSTA | MO | 1,742 |
| 5 | 63341 | DEFIANCE | MO | 3,628 |
| 6 | 63348 | FORISTELL | MO | 10,555 |
| 7 | 63367 | LAKE SAINT LOUIS | MO | 27,371 |
| 8 | 63304 | SAINT CHARLES | MO | 42,738 |
| 9 | 63368 | O FALLON | MO | 46,124 |
| 10 | 63303 | SAINT CHARLES | MO | 47,285 |
| 11 | 63385 | WENTZVILLE | MO | 48,535 |
| 12 | 63301 | SAINT CHARLES | MO | 51,401 |
| 13 | 63366 | O FALLON | MO | 52,746 |
| 14 | 63376 | SAINT PETERS | MO | 74,967 |