Maine State Route 15

State Route 15
Route of SR 15 highlighted in red
Route information
Maintained by MaineDOT
Length:	180.5 mi (290.5 km)
Existed:	1925 – present
Major junctions
South end:	Main Street / West Main Street / School Street in Stonington
	US 1 / SR 3 in Bucksport I‑395 in Bangor I‑95 in Bangor US 2 / SR 100 in Bangor
North end:	US 201 / SR 6 in Jackman
Location
Counties:	Hancock, Penobscot, Piscataquis, Somerset
Highway system
Maine State Highway System Interstate U.S. State ← SR 11A SR 16 → ← SR 172 SR 173 →

State Route 15 Business
Location:	Brewer–Bangor
Length:	2.8 mi (4.5 km)

State Route 15 (SR 15) is a numbered state highway in Maine, United States. SR 15 runs over 180 miles (290 km) from Stonington in the south to Jackman in the north.

SR 15 begins in the town of Stonington, at the intersection of Main Street, School Street, and West Main Street. The route proceeds north out of Stonington and through Deer Isle en route to the mainland of Maine. Upon leaving the islands to the south, SR 15 meets SR 175 and forms an approximately 2-mile (3.2 km) concurrency with it. SR 15 then splits off 175 and then joins SR 176 farther to the north. The two routes continue into Blue Hill, where SR 15 turns northward, while 176 goes to the east. Continuing north, Route 15 meets SR 199 in North Penobscot. Upon reaching Orland, SR 15 meets U.S. Route 1 (US 1) and SR 3, and joins the concurrency northbound. The road sees the ends of Routes 166 and 46 before reaching the town of Bucksport. Upon reaching the town, US 1 and SR 3 split off and SR 15 turns northward towards Bangor.