Zip Area Code

Jefferson County, Missouri

Jefferson County, Missouri, has 33 towns and 19 ZIP codes, in area codes 636 and 314 (overlay 557).

Towns in Jefferson County, A to Z

TownZIP codesArea codes
Arnold63010636
Barnhart63012636
Briarwood Estatesnearest63020636
Byrnes Millnearest63025, 63049, 63051636
Cedar Hill63016636
Cedar Hill Lakesnearest63016, 63023636
Crystalnearest63019, 63048636
Crystal City63019636
De Soto63020636
Dittmer63023636
Fenton63026, 63099314, 557
Festus63028636
Hematite63047636
Herculaneum63048636
High Ridge63049636
Hillsboro63050636
Horinenearest63019, 63048, 63070636
House Springs63051636
Imperial63052636
Kimmswick63053636
LaBarque Creeknearest63015, 63016, 63069636
Liguori63057636
Mapaville63065636
Morse Mill63066636
Murphynearest63026, 63049, 63088636, 314, 557
Oakvillenearest63010, 63128, 63129314, 636, 557
Olympiannearest63028, 63047636
Parkdalenearest63025, 63026, 63049636, 314, 557
Peacefulnearest63025, 63049636
Pevely63070636
Raintreenearest63050636
Scotsdalenearest63016, 63051636
Summer Setnearest63020636

ZIP codes in Jefferson County

Area codes in Jefferson County

  • Area code 636

    In service since May 22, 1999. Local calls are dialed with seven digits.

  • Area code 314

    In service since 1947. Shares its area with 557. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

  • Area code 557

    In service since August 12, 2022. Shares its area with 314. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

Local numbers in area code 636

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