Interstate 55 in Missouri

Interstate 55
I-55 highlighted in red
Route information
Maintained by MoDOT
Length210.45 mi (338.69 km)
Existed1956–present
NHSEntire route
Major junctions
South end I-55 at the Arkansas state line near Blytheville, AR
Major intersections
North end I-55 / I-64 / US 40 at the Illinois state line in St. Louis
Location
CountryUnited States
StateMissouri
CountiesPemiscot, New Madrid, Scott, Cape Girardeau, Perry, Ste. Genevieve, Jefferson, St. Louis, City of St. Louis
Highway system
US 54 US 56

Interstate 55 (I-55) in the US state of Missouri runs from the Arkansas state line to the Poplar Street Bridge over the Mississippi River in St. Louis.