Route 74 is a state highway in Connecticut in the eastern part of the Greater Hartford area.

It runs from Route 194 in South Windsor to US 44 in Ashford, going through the towns of Ellington, Vernon, Tolland, and Willington.

In Ellington, it continues northeastward and then loops southeastward into Vernon.

This change was reversed on December 1, 1982 with the connection of Interstate 84 with I-384 and the southward rerouting of US 44 to its original surface route.

In 1993, for safety reasons, the western terminus was moved slightly north to its current location.