Minnesota State Highway 55 is a state highway that runs 221 miles (356 km) across the central part of state taking a diagonal route from its western most at the North Dakota state line near Tenney to its easternmost point at the intersection with U.S. Highway 61 (US 61) in Hastings. In Minneapolis and Golden Valley, portions of the route are also signed as Olson Memorial Highway.

Tenney is an unincorporated community and former city in section 28 of Campbell Township, Wilkin County, Minnesota, United States. A post office was established there in 1887, and Tenney was incorporated as a city on November 30, 1901. The population was five at the 2010 census, tying Tenney with Funkley as Minnesota's least populous community. It is part of the Wahpeton, ND–MN Micropolitan Statistical Area. The only portion of Tenney that is still active is a grain elevator along the tracks on the south side of town.