Route 127 is a state highway in southwestern Connecticut, running entirely from Bridgeport to Trumbull.

It serves as a minor arterial, connecting all four major freeways in the Bridgeport area.

It then heads north, roughly parallel to the Pequonnock River and Route 8, into Trumbull.

[1] White Plains Road was laid out to Pulpit Rock, in present-day Trumbull, in 1705.

At an undetermined time before 1978, the southern terminus was truncated to the Huntington Turnpike (SR 730).