Kentucky State Route 373 is a north-south highway in Northern Lyon County. It runs from U.S. Rt. 62/641; Kentucky State Route 93, at Eddyville, to Kentucky Secondary State Route 1943, north of Eddyville. KY St Rt 373 passes through the following town in Lyon County. Eddyville KY St Rt 373 is not multi-plexed in Lyon County. KY St Rt 373 intersects the following highways in Lyon County. U.S. Rt. 62, at Eddyville. U.S. Rt. 541, at Eddyville. Kentucky State Route 93, at Eddyville.
A junction marker on WB U.S. Rt. 62/SB U.S. Rt. 641; NB KY St Rt 93.
A guide marker on WB U.S. Rt. 62/SB U.S. Rt. 641/NB KY St Rt 93.