Marshall Township is a township in Mower County, Minnesota, United States. The population was 382 at the 2000 census. The largest town in the township is Elkton with a population of 149 people. All other area in the township is unincorporated.
The land of Marshall Township originally contained a few small, shallow lakes, but they have since been drained to allow for increased farming. Helge Erickson. a Norwegian, settled in the western half of the southwest quadrant of section 36 in 1856 and John Osmunsen (born Jone Hauske Osmundson), another Norwegian, came from Wisconsin and settled on the eastern half of the southeast quadrant of the same section the following year together with his wife Ellen Serena Osmundsen (born Vignes, Hansdatter / daughter of Hans and Siri Olsen Finnøy, Norway). The township was first named "York" and later "Beach" before finally being named for William Rainey Marshall in 1870. Marshall was the fifth Governor of Minnesota and he owned la