Tower is a city located in St. Louis County, Minnesota, USA. As of the 2000 census, the city had a total population of 502. State Highway 1, State Highway 169, and State Highway 135 are three of the main arterial routes in the city. The city was incorporated March 13, 1889, which makes it the oldest city in the Arrowhead region. It owes its establishment to the Soudan Mine and was named after mining financier Charlemagne Tower. Tower is home to the Tower Train Museum; near the museum is McKinley Monument, the first erected in honor of former U.S. President William McKinley shortly after his assassination in 1901. Tower set the Minnesota record for coldest temperature on February 2, 1996, when the temperature dropped to -60°F.