Route 75 (Connecticut–Massachusetts)

Route 75
Route 75
	Map of northern Connecticut and southern Massachusetts with CT 75 in solid red and MA 75 in dotted red
Route information
	Maintained by CTDOT
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 / Route 305 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
Country	United States
States	Connecticut, Massachusetts
Counties	CT: Hartford, MA: Hampden
Highway system
	Connecticut State Highway System; Interstate; US; State SSR; SR; ; Scenic;
	Massachusetts State Highway System; Interstate; US; State;

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).