The Mohave Union High School Gymnasium is the original gymnasium of Mohave County Union High School, now the site of Lee Williams High School, at 301 First Street in Kingman, Arizona.

It is listed on the National Register of Historic Places for its lamella roof, which gives the building "exceptional merit".

P. W. Womack was the contractor from Phoenix and J. Harve Kester was the WPA inspector.

In 1986, the building was listed on the National Register of Historic Places.

Only one other gymnasium in the state used a lamella roof, the gymnasium at Phoenix Union High School, built circa 1940 and demolished in the late 1980s.