Washtenaw County, Michigan

Washtenaw County, Michigan, has 12 towns and 19 ZIP codes, in area code 734, with 679 as an overlay.

Towns in Washtenaw County, A to Z

Town	ZIP codes	Area codes
Ann Arbor	48103, 48104, 48105, 48106, 48107, 48108 and more	734, 679
Barton Hills	nearest48104, 48105, 48109	734, 679
Bridgewater	48115	734, 679
Chelsea	48118	734, 679
Dexter	48130	734, 679
Manchester	48158	734, 679
Salem	48175	734, 679
Saline	48176	734, 679
Whitmore Lake	48189	734, 679
Whittaker	48190	734, 679
Willis	48191	734, 679
Ypsilanti	48197, 48198	734, 679

ZIP codes in Washtenaw County

48103Ann Arbor734, 679
48104Ann Arbor734, 679
48105Ann Arbor734, 679
48106Ann Arbor734, 679
48107Ann Arbor734, 679
48108Ann Arbor734, 679
48109Ann Arbor734, 679
48113Ann Arbor734, 679
48115Bridgewater734, 679
48118Chelsea734, 679
48130Dexter734, 679
48158Manchester734, 679
48175Salem734, 679
48176Saline734, 679
48189Whitmore Lake734, 679
48190Whittaker734, 679
48191Willis734, 679
48197Ypsilanti734, 679
48198Ypsilanti734, 679

Area codes in Washtenaw County

Area code 734
In service since December 13, 1997. Shares its area with 679. Local calls are dialed with seven digits; dialing ten digits also works.
Area code 679
In service since November 7, 2025. Shares its area with 313. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

Local numbers in area code 734

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