Kentucky Route 1978 (KY 1978), known locally as Greendale Road, is an urban secondary state highway located entirely in northern Fayette County in East Central Kentucky.

The 2.242 miles (3.608 km) mainly traverses the northwestern outskirts of Lexington.

[1] KY 1978 originates on Leestown Pike (US 421) in the northwestern outskirts of Lexington.

It crosses Citation Boulevard before ending with a junction with KY 1977 in the Greendale neighborhood in north Lexington.

[2] The entire route is in Lexington, Fayette County.