Mary Ellen Dinkel Otremba (September 26, 1950 – July 16, 2014) was an American politician and a former member of the Minnesota House of Representatives who represented District 11B, which includes portions of Douglas and Todd counties in the west central part of the state. A Democrat, she was also a substitute teacher and farmer. On May 19, 2010, she announced that she would not seek an eighth term. Otremba died on July 16, 2014 in Long Prairie, Minnesota.