Area code 314 was brought into effect on January 1, 1947.
Counties in Area Code 314
- Saint Louis,
- Saint Louis City.
Most Populous Cities in Area Code 314
|City||County||City Population||Time Zone|
|St. Louis||Saint Louis||619,011||CST|
|St. Louis||Saint Louis City||308,143||CST|
|Maryland Heights||Saint Louis||22,400||CST|
|Saint Ann||Saint Louis||15,186||CST|
|Valley Park||Saint Louis||8,281||CST|
Note: The above list is based off of the top 25 most populous cities in the area code as per 2012 United States Census Bureau estimates.
View all United States Area Codes.
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