Tennessee State Route 21

State Route 21 primary marker State Route 21 secondary marker

State Route 21
Route information
Maintained by TDOT
Major junctions
West end: Mississippi River near Tiptonville
  SR 22 at Tiptonville
SR 78 at Tiptonville
US 51 at Troy
US 45W in Union City
East end: KY 116 / KY 239
Location
Counties: Obion, Lake
Highway system
  • Tennessee State Routes
SR 20SR 22

State Route 21 is a two lane highway that runs from the Mississippi River west of Tiptonville, Tennessee to the Kentucky state line north of Union City. This road provides access to Reelfoot Lake State Park.