State Highway 68 serves as an east–west route in southwest and south-central Minnesota between Canby, Minneota, Marshall, Morgan, Sleepy Eye, New Ulm, and Mankato.
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The section of present day State Highway 68 between U.S. Highway 169 (at Mankato) and State Highway 15 (immediately south of New Ulm) was originally designated Highway 83 as well between 1934 and 1963.