Saint Louis, MO is served by area code 314. Area code 314 is one of two original area codes assigned to Missouri and put into service on January 1, 1947.
In addition to Saint Louis, MO area code 314 serves St. Louis and the larger suburb communities of Ferguson, Florissant, Hazelwood, Kirkwood, Maryland Heights, Mehville, Oakville, Overland, Spanish Lake, St. Louis, University City and Webster Grove, as well as, many smaller communities near St. Louis.
Saint Louis, MO is located in Saint Louis City County and observes the Central Time Zone.
View our Times by Area Code tool.