Kentucky Route 187 (KY 187) is a north–south state highway that traverses Edmonson and Grayson counties in west-central Kentucky.

The highway begins at an intersection with KY 70 at the unincorporated community of Huff, which is located almost halfway between Roundhill and Brownsville.

The first few miles of KY 187 is designated as part of the Duncan Hines Scenic Byway, part of the Kentucky Scenic Byway system.

The highway runs concurrently with KY 238 in the community of Sunfish for about a mile (1.6 km).

Three miles (4.8 km) later, KY 187 goes under an overpass that carries the Wendell H. Ford Western Kentucky Parkway and enters the city of Leitchfield before meeting its northern terminus at the intersection with U.S. Route 62 (US 62) on the west side of Leitchfield.