U.S. Route 421 in Kentucky

U.S. Route 421 (US 421) in the U.S. state of Kentucky is a 250.536-mile-long (403.199 km) north–south United States highway that traverses twelve counties in the central and eastern parts of the state. It travels in a southeast-to-northwest path from the Virginia state line near Pennington Gap to the Indiana state line, on the Ohio River at Milton, Kentucky and Madison, Indiana.

U.S. Route 421

US 421 highlighted in red
Route information
Maintained by KYTC
Length250.536 mi (403.199 km)
Major junctions
South end US 421 at the Virginia state line near Pennington Gap, Virginia
Major intersections
North end US 421 at the Indiana state line near Madison
Location
CountryUnited States
StateKentucky
CountiesHarlan, Leslie, Clay, Jackson, Rockcastle, Madison, Fayette, Scott, Woodford, Franklin, Shelby, Henry, Trimble
Highway system
  • Kentucky State Highway System
KY 420 KY 422
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