The building currently known as Mt. Airy Middle School was originally built in 1956 as a high school. The 3 level, 16 classroom building with auditorium gymnasium, library, cafeteria, industrial arts and vocational agricultural shops, locker rooms, lavatories and offices opened in September of 1957. In 1966, after the completion of South Carroll High School, the Mt. Airy School became Mt. Airy Middle School.

During the 1999-2000 school year, Mt. Airy Middle School was named an Honorable Mention School in the Maryland Blue Ribbon School Program. This program identifies school of excellence in the areas of academic achievement, curricular excellence, significant parent and community involvement, and continuous staff development and growth. In September 2001, Mt. Airy Middle School became the first middle school in Carroll County to earn Blue Ribbon Status.

Due to serious overcrowding in Mt. Airy Elementary School, it was determined that a new elementary school would be built in Watkins Park. Until the completion of the new schools the 5th grade would move to the middle school. With the start of the 2002-03 school year, the 5th grade moved into portables behind the middle school. Parr's Ridge Elementary school opened in September of 2005 and  Mt. Airy Middle School  converted back to grades 6th, 7th and 8th.