Pioneer High School is a public school in Ann Arbor, Michigan. Founded in 1856, the school was previously called the Union School and Ann Arbor High School. In 2010, Pioneer was listed as a "Silver Medal School" by the U.S. News & World Report. For years, Pioneer and cross-town Huron High School were among the largest high schools in the state of Michigan. However, their enrollment decreased following the opening of Skyline High School, a third comprehensive secondary school in the district, in 2008.
