Zip Area Code

Hamilton County, Tennessee

Hamilton County, Tennessee, has 27 towns and 32 ZIP codes, in area code 423, with 729 as an overlay.

Towns in Hamilton County, A to Z

TownZIP codesArea codes
Apison37302423, 729
Bakewell37304423, 729
Birchwood37308423, 729
Chattanooga37401, 37402, 37403, 37404, 37405, 37406 and more423, 729
Collegedale37315423, 729
East Ridgenearest37404, 37411, 37412423, 729
Fairmountnearest37377, 37405423, 729
Falling Waternearest37343423, 729
Flat Top Mountainnearest37379423, 729
Georgetown37336423, 729
Harrison37341423, 729
Hixson37343423, 729
Hopewellnearest37312, 37336423, 729
Lakesitenearest37341, 37343423, 729
Lone Oaknearest37377, 37405423, 729
Lookout Mountain37350423, 729
Lupton City37351423, 729
McDonaldnearest37311, 37353, 37363423, 729
Middle Valleynearest37343423, 729
Mowbray Mountainnearest37379423, 729
Ooltewah37363423, 729
Red Banknearest37351, 37406, 37415423, 729
Ridgesidenearest37404, 37406, 37411423, 729
Sale Creek37373423, 729
Signal Mountain37377423, 729
Soddy Daisy37379, 37384423, 729
Waldennearest37377, 37405, 37415423, 729

ZIP codes in Hamilton County

Area codes in Hamilton County

  • Area code 423

    In service since September 11, 1995. Shares its area with 729. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

  • Area code 729

    In service since September 5, 2025. Shares its area with 423. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

Local numbers in area code 423

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