- Southern Terminus:
- CT 8 in Thomaston
- Northern Terminus:
- East Street (CT 118) in Litchfield
- 8.41 miles
CT 254 is a north/south route in the Litchfield Hills region of Connecticut. It begins in Thomaston at the CT 8 expressway and runs northwest to Litchfield. The entire length is a two-lane undivided local road. Much of CT 254 is a designated scenic road.