Trunk Highway 40 | ||||
|---|---|---|---|---|
 MN 40 highlighted in red | ||||
| Route information | ||||
| Maintained by MnDOT | ||||
| Length | 72.723 mi (117.036 km) | |||
| Existed | 1933[citation needed]–present | |||
| Major junctions | ||||
| West end |  SD 20 near Marietta, MN, and Revillo, SD | |||
 US 75 at Madison  US 59 / MN 7 at Milan | ||||
| East end |  CSAH 5 in Willmar | |||
| Location | ||||
| Country | United States | |||
| State | Minnesota | |||
| Counties | Lac qui Parle, Chippewa, Kandiyohi | |||
| Highway system | ||||
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Minnesota State Highway 40 (MN 40) is a 72.723-mile-long (117.036 km) state highway in west-central Minnesota, which travels from South Dakota Highway 20 (SD 20) at the South Dakota state line near Marietta and continues east to its eastern terminus at its intersection with County State-Aid Highway 5 (CSAH 5) in Willmar.