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St. Charles County Area Codes

About St. Charles County Area Codes

The county of St. Charles County, located in Missouri, is served by 1 telephone area code(s) in this dataset. These calling codes cover cities, suburbs, and unincorporated communities across the county.

Major phone area codes used in St. Charles County include 636. The county mainly follows the America/Chicago time zone.

Cities and towns served by these area codes in St. Charles County include O'Fallon, Saint Charles, Saint Peters.

List of Area Codes in St. Charles County, Missouri

The table below lists all telephone area codes used in St. Charles County, Missouri, along with their associated cities and time zones from this dataset.


S.N. Area Code Cities Time Zone(s)
1 636 O'Fallon, Saint Charles, Saint Peters America/Chicago


Related Area Code Pages

Explore related area code resources on Burning Compass:

  • All area codes in Missouri
  • Individual area code details are available from the table above.

County Area Codes in Missouri

  1. Boone County Area Codes
  2. Buchanan County Area Codes
  3. Cape Girardeau County Area Codes
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  10. Pettis County Area Codes
  11. St. Charles County Area Codes
  12. St. Louis County Area Codes

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