St. Charles County, Missouri ZIP codes
17ZIP codes
13Cities and towns
416,486People in ZIP areas
314, 557, 618Area codes
St. Charles County is in Missouri and the Central Time zone. ZIP codes don’t follow county lines exactly, so a ZIP code listed here can reach into a neighboring county.
All ZIP codes in St. Charles County
| ZIP code | City | Type | Population | Median income |
|---|---|---|---|---|
| 63301 | Saint Charles | Standard | 52,667 | $85,308 |
| 63302 | Saint Charles | PO Box only | – | – |
| 63303 | Saint Charles | Standard | 46,089 | $99,138 |
| 63304 | Saint Charles | Standard | 43,195 | $114,442 |
| 63332 | Augusta | Standard | 1,651 | $146,146 |
| 63338 | Cottleville | PO Box only | – | – |
| 63341 | Defiance | Standard | 3,515 | $170,598 |
| 63346 | Flinthill | PO Box only | – | – |
| 63348 | Foristell | Standard | 10,394 | $115,661 |
| 63365 | New Melle | PO Box only | 51 | $53,542 |
| 63366 | O Fallon | Standard | 54,769 | $100,621 |
| 63367 | Lake Saint Louis | Standard | 29,725 | $137,648 |
| 63368 | O Fallon | Standard | 46,966 | $124,297 |
| 63373 | Portage Des Sioux | Standard | 690 | $88,750 |
| 63376 | Saint Peters | Standard | 74,962 | $96,393 |
| 63385 | Wentzville | Standard | 51,330 | $112,199 |
| 63386 | West Alton | Standard | 482 | $110,250 |
Cities and towns in St. Charles County
- Saint Charles 4 ZIPs
- O Fallon 2 ZIPs
- Augusta 1 ZIP
- Cottleville 1 ZIP
- Defiance 1 ZIP
- Flinthill 1 ZIP
- Foristell 1 ZIP
- Lake Saint Louis 1 ZIP
- New Melle 1 ZIP
- Portage Des Sioux 1 ZIP
- Saint Peters 1 ZIP
- Wentzville 1 ZIP
- West Alton 1 ZIP
Area codes in St. Charles County
Questions
- How many ZIP codes are in St. Charles County, MO?
- St. Charles County has 17 ZIP codes, 13 of them standard ZIP codes for street addresses.
- What cities are in St. Charles County?
- St. Charles County ZIP codes cover Saint Charles, O Fallon, Augusta, Cottleville, Defiance, Flinthill, Foristell and Lake Saint Louis and 5 other places.
- What area code is St. Charles County, MO?
- St. Charles County uses area codes 314, 557, 618 and 636.
- What time zone is St. Charles County in?
- St. Charles County is in Central Time.
Other Missouri counties
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