U.S. Route 1 in Maine

U.S. Route 1
US 1 highlighted in red
Route information
Maintained by MaineDOT
Length	526.05 mi[1][2] (846.60 km)
Existed	1926–present
Major junctions
South end	US 1 in Portsmouth, NH
Major intersections	I-195 in Saco I-295 at the Portland-Yarmouth line US 302 / SR 100 in Portland I-495 in Falmouth US 201 in Brunswick SR 9 in Calais US 2 in Houlton I-95 in Houlton SR 161 in Caribou SR 11 in Fort Kent
North end	Route 161 in Clair, NB
Location
Country	United States
State	Maine
Counties	York, Cumberland, Sagadahoc, Lincoln, Knox, Waldo, Hancock, Washington, Aroostook
Highway system
United States Numbered Highway System List Special Divided Maine State Highway System Interstate US State Auto trails Lettered highways
← I-495 → US 1A
← Route 20 N.E. → Route 25

U.S. Route 1 (US 1) in the U.S. state of Maine is a major north–south section of the United States Numbered Highway System, serving the eastern part of the state. It parallels the Atlantic Ocean from New Hampshire north through Portland, Brunswick, and Belfast to Calais, and then the St. Croix River and the rest of the Canada–United States border via Houlton to Fort Kent. The portion along the ocean, known as the Coastal Route, provides a scenic alternate to Interstate 95 (I-95).