U.S. Route 40 in Missouri

U.S. Route 40 (US 40) in the state of Missouri is a U.S. highway that runs from Kansas City to St. Louis. Outside of Greater St. Louis, much of the route either parallels or runs along I-70. East of Wentzville in Greater St. Louis, the route runs along I-64.

U.S. Route 40

US 40 highlighted in red
Route information
Maintained by MoDOT
Existed1926–present
Major junctions
West end I-70 / US-24 / US-40 / US-169 in Kansas City
Major intersections
East end I-55 / I-64 / US 40 in St. Louis
Location
CountryUnited States
StateMissouri
CountiesJackson, Lafayette, Saline, Cooper, Howard, Boone, Callaway, Montgomery, Warren, St. Charles, St. Louis, City of St. Louis
Highway system
Route 39 Route 41
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