Route 372 is a 14.95-mile (24.06 km) state highway in Hartford and Middlesex counties in central Connecticut, United States, running from Plainville to Cromwell, and serving to communicate between the numerous freeways in the area. The section of Route 372 from Route 10 in Plainville to the Plainville-New Britain town line is designated the Joseph E. Tinty Memorial Highway. The section of Route 372 from the interchange with Route 72 in New Britain to the intersection with Route 71A and SR 571 in Berlin is designated the Polish Legion of American Veterans Memorial Highway.

Route 372 begins at an intersection with Route 72 in western Plainville, near the Plainville-Bristol town line, and heads generally east. It intersects Route 177, then passes through the town center. It has a junction with Route 10 just before passing under Route 72 with eastbound access provided by Hooker Street (SR 511). At the New Britain, it passes under I-84 without an interchange, then turns southeast to intersect Route 72 again at Exit 7. It continues southeast, and intersects SR 571 at the Berlin town line. Eastbound traffic continues on one-way SR 918 to cross Route 71A, while westbound traffic briefly overlaps with Route 71A through the intersection. In the Kensington section of town, it intersects Route 71, and passes the Berlin Amtrak station. Just north of Berlin Center, it intersects Route 9 at Exit 22, the US 5/Route 15 concurrency (the Berlin Turnpike), and Route 9 again at Exit 21 in rapid succession. It continues east through East Berlin and crosses the Mattabesset River into Cromwell. In Cromwell, it continues easterly along the Mattabesset River, intersecting I-91 at Exit 21. It then widens to 4 lanes, and intersects the northern end of Route 217. Farther east, it crosses Route 3 before meeting Route 9 once again at Exit 19. It then turns southeast to at an intersection with Route 99 at the Cromwell town center.

Route 72 was established in the 1932 state highway renumbering between Route 66 in Middletown and Route 10 Plainville. By the beginning of 1963, after the implementation of the 1962 Route Reclassification Act, Route 72 was extended west and north through Bristol and Plymouth to Route 4 in Harwinton. A freeway along the Route 72 corridor between Berlin (incorporating sections of what is now Route 9) and Plainville was built beginning in the late 1950s and opened in stages beginning in 1961. By late 1980, the Route 72 freeway was fully open between the Berlin Turnpike and the current west end of the freeway in Plainville.

With the extension of the Route 72 freeway in New Britain in 1978 and in Plainville in 1980, Route 372 was designated along the former surface route of Route 72. In 1980, Route 372 ran from the end of the Route 72 freeway in Plainville to Exit 24 of Route 9 in Berlin, including the Willow Brook Connector (now State Road 571). In 1990, a freeway link between I-91 and the east end of the Route 72 freeway was completed. This resulted in the Route 9 designation being extended westward to Exit 28, Route 72 being truncated in the east to end at Route 9, the Willow Brook Connector being redesignated as SR 571, and Route 372 being rerouted and extended eastward along the former Route 72 in Berlin and Cromwell to Route 3 (Route 3 was extended south along old Route 72 to Middletown at the same time). Additionally, Route 372 continued east to Route 99 along a former unsigned state road.

County	Location	mi	km	Destinations	Notes
Hartford	Bristol–Plainville line	0.00	0.00	East Main Street – Forestville	Continuation west; former Route 72
	Plainville	0.12	0.19	Route 72 – Bristol, New Britain
		0.71	1.14	Route 177 – Unionville, Southington
		1.67	2.69	Route 10 – Southington, Farmington
		1.82– 2.40	2.93– 3.86	Route 72 to I-84 – New Britain, Bristol	Exit 4 on Route 72
		2.94	4.73	To I-84 / Route 72 east – Hartford, New Britain	Access via SR 536
	New Britain	4.56	7.34	Route 72 – Bristol, Downtown New Britain	Exit 2 on Route 72
	Berlin	6.14– 6.35	9.88– 10.22	Route 71A to Route 9 south / Route 71 – Middletown, Meriden, New Britain	Eastbound Route 372 traffic uses SR 918 to continue east; westbound Route 372 traffic overlaps with Route 71A from milepost 6.27 to 6.35 to continue west; access to Route 9/Route 71 via SR 571
		7.63	12.28	Route 71 – Meriden, New Britain
		9.15– 9.34	14.73– 15.03	Route 9 / US 5 / Route 15 (Berlin Turnpike) – Meriden, Middletown, New Britain, Newington, Hartford	Interchange; exit 32 on Route 9
		9.84	15.84	Route 9 south – Middletown	Exit 31 on Route 9
Middlesex	Cromwell	11.80	18.99	I-91 – New Haven, Hartford	Exit 25 on I-91
		12.34	19.86	Route 217 south – Westfield, Middlefield
		13.30	21.40	Route 3 – Middletown, Rocky Hill
		13.42	21.60	Route 9 – Middletown, New Britain	Exit 27 on Route 9
		15.12	24.33	Route 99 – Middletown, Rocky Hill	Eastern terminus; former Route 9
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

• List of state highways in Connecticut

Media related to Connecticut Route 372 at Wikimedia Commons