I-55 highlighted in red | ||||
Route information | ||||
Maintained by MoDOT | ||||
Length | 210.45 mi[1] (338.69 km) | |||
Existed | 1956–present | |||
NHS | Entire route | |||
Major junctions | ||||
South end | ![]() | |||
North end | ![]() ![]() ![]() | |||
Location | ||||
Country | United States | |||
State | Missouri | |||
Counties | Pemiscot, New Madrid, Scott, Cape Girardeau, Perry, Ste. Genevieve, Jefferson, St. Louis, City of St. Louis | |||
Highway system | ||||
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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.