Kentucky Route 80

Parts of this article (those related to Route description and length) need to be updated. The reason given is: KY 80 near Mayfield needs to be fixed.. Please help update this article to reflect recent events or newly available information. (August 2023)

Kentucky Route 80
KY 80 highlighted in red
Route information
Maintained by KYTC
Length	483.550 mi[1] (778.198 km)
Major junctions
West end	KY 58 / KY 123 in Columbus
Major intersections	I-69 in Mayfield I-24 near Cadiz I-169 in Hopkinsville I-165 in Bowling Green US 31W in Bowling Green I-65 in Oakland US 31E in Glasgow US 27 in Somerset I-75 in London US 23 / Corridor B in Watergap
East end	SR 80 east of Elkhorn City
Location
Country	United States
State	Kentucky
Counties	Hickman, Carlisle, Graves, Calloway, Marshall, Trigg, Christian, Todd, Logan, Warren, Barren, Metcalfe, Adair, Russell, Casey, Pulaski, Laurel, Clay, Leslie, Perry, Knott, Floyd, Pike
Highway system
Kentucky State Highway System Interstate US State Parkways
← KY 79 → KY 81

Kentucky Route 80 (KY 80) is a 483.55-mile-long (778.20 km) state highway in the southern part of the U.S. state of Kentucky. The route originates on the state's western border at Columbus in Hickman County and stretches across the southern portion of the state, terminating southeast of Elkhorn City on the Virginia state line. It is the longest Kentucky State Highway, though the official distance as listed in route logs is much less due to multiple concurrencies with U.S. Route 68 (US 68) and US 23.

The route was split into two segments from 2003 to November 2009. Construction and relocation of KY 80 in Graves, Calloway, and Marshall counties during this time caused the route to be split. A new, four-laned 8.5-mile (13.7 km) section of KY 80 opened in Calloway County on November 25, 2009. The route is now a four-lane divided highway from Mayfield to Bowling Green after the widening to four lanes from Canton to Cadiz was completed in 2020.^{[citation needed]}