Washington County, Tennessee

Washington County, Tennessee, has 11 towns and 11 ZIP codes, in area code 423, with 729 as an overlay.

Towns in Washington County, A to Z

Town	ZIP codes	Area codes
Central	nearest37601, 37682, 37694	423, 729
Fall Branch	37656	423, 729
Gray	nearest37615, 37663	423, 729
Johnson	nearest37601, 37604, 37614	423, 729
Johnson City	37601, 37602, 37604, 37605, 37614, 37615	423, 729
Jonesborough	37659	423, 729
Limestone	37681	423, 729
Mountain Home	37684	423, 729
Pine Crest	nearest37601, 37614, 37682	423, 729
Spurgeon	nearest37615, 37663	423, 729
Telford	37690	423, 729

ZIP codes in Washington County

37601Johnson City423, 729
37602Johnson City423, 729
37604Johnson City423, 729
37605Johnson City423, 729
37614Johnson City423, 729
37615Johnson City423, 729
37656Fall Branch423, 729
37659Jonesborough423, 729
37681Limestone423, 729
37684Mountain Home423, 729
37690Telford423, 729

Area codes in Washington 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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