Massachusetts Route 75

Route 75
Map of northern Connecticut with CT 75 highlighted in solid red and of southern Massachusetts with MA 75 highlighted in dotted red
Route information
Length:	17.53 mi (28.21 km) Connecticut: 13.52 mi (21.76 km) Massachusetts: 4.01 mi (6.45 km)
Existed:	1932 (extended 1950) – present
Major junctions
South end:	Route 159 in Windsor, CT
	I-91 in Windsor, CT Route 20 in Windsor Locks, CT Route 57 in Agawam, MA
North end:	Route 147 / Route 159 in Agawam, MA
Location
Counties:	CT: Hartford, MA: Hampden
Highway system
Routes in Connecticut Interstate U.S. State SSR SR Massachusetts State Highway System Interstate US State ← Route 74 CT Route 77 → ← Route 71 MA Route 78 →

Route 75 in the U.S. states of Connecticut and Massachusetts is a 17.5-mile-long (28.2 km) scenic route connecting the Hartford, Connecticut, and Springfield, Massachusetts, areas. The route begins at Route 159 in the town of Windsor, Connecticut, and ends at the junction of Route 159/Route 147 in the city of Agawam, Massachusetts.

The route acquired its modern designation in the 1932 state highway renumbering, becoming a loop route off then U.S. Route 5A (US 5A, modern Route 159) through the town center of Suffield. In 1950, the north end was realigned to extend into Agawam. The portion in Agawam is a municipal road and is not a state highway (i.e. not a state-maintained road).