Ranking of St Charles, MO Cities and Places By population in 2021
Updated on June 27, 2025.
Based on the US Census Vintage data estimates, in 2021, among all St Charles, MO cities and places, Balance of St. Charles County had the highest population (94.04K), followed by O'Fallon city (93.75K), and St. Charles city (71.10K).
The chart below shows the top 10 cities and places, and the table below shows the ranking of all St Charles cities and places.
You can see similar information for other Missouri counties. You can also see the ranking of all cities and places in Missouri.
Data Source: US Census Bureau (Vintage).
Ranking of St Charles, MO Cities and Places By population in 2021
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| Rank | City or Place | Population |
|---|---|---|
| 1 | Balance of St. Charles County | 94038 |
| 2 | O'Fallon city | 93747 |
| 3 | St. Charles city | 71102 |
| 4 | St. Peters city | 58216 |
| 5 | Wentzville city | 45875 |
| 6 | Lake St. Louis city | 17317 |
| 7 | Dardenne Prairie city | 12954 |
| 8 | Cottleville city | 5772 |
| 9 | Weldon Spring city | 5311 |
| 10 | St. Paul city | 3303 |
| 11 | New Melle city | 548 |
| 12 | Flint Hill city | 521 |
| 13 | Josephville village | 481 |
| 14 | West Alton city | 355 |
| 15 | Portage Des Sioux city | 329 |
| 16 | Foristell city (pt.) | 284 |
| 17 | Augusta town | 269 |
| 18 | Weldon Spring Heights town | 93 |