Until recently, the mascot was a Mohawk[3] (Indian Tribe figure).

The current high school building at 1700 4th Street SE was constructed in 1966 after the 1917 building became overcrowded due to the rapidly growing student population during the 1946-1964 "Baby Boom".

The building suffered a catastrophic roof failure after a heavy storm in May 2019, with the building then being declared unsafe and all the businesses and agencies located there having to be forced to find new quarters.

MCHS is a member of the Iowa Alliance Conference (IAC).

In early 2020, there was some talk of switching to the seven-member Northeast Iowa Conference, where Mason City would be far and away the largest school.