Jefferson County, Missouri
Localities: Central Township | De Soto | Imperial | Rock Township
Central Township
MO-21 South/MO-B East at MO-21 North
MO-21 South/MO-B East at MO-21 North interchange to Saint Louis.
MO-21 South at MO-B
MO-21 South at MO-B. This is the southern end of the MO-21 freeway. Turn left to continue on MO-21 south.
MO-21 South - MO-B Interchange
MO-21 South approaching MO-B Interchange.
De Soto
MO-21 South at MO-H and MO-N
MO-21 South at MO-H and MO-N in De Soto.
MO-21 South Approaching MO-H and MO-N
MO-21 South approaching MO-H and MO-N in De Soto.
MO-21 South at MO-Y
MO-21 South at MO-Y in De Soto. Turn right for Richwoods; left for De Soto. Continue south on MO-21 for Potosi.
MO-21 South at MO-Y
MO-21 South at MO-Y in De Soto.
MO-21 South at MO-110
MO-21 South at MO-110 in Jefferson County
Imperial
MO-21 South - MO-M/MO-MM Interchange
MO-21 South at MO-M/MO-MM/Barnhart/House Springs interchange.
Rock Township
MO-21 South at MO-141 Interchange
MO-21 South at MO-141 to Arnold and Fenton interchange.