Harry T. Gast Jr. (September 19, 1920 – July 30, 2015) was a Republican politician from Michigan who served in both houses of the Michigan Legislature and in various local offices between the mid-1950s and 2002.

During his final 18 years in the Senate, Gast chaired the appropriations committee.

He then became township supervisor for eight years before running for the Michigan House of Representatives.

He also served as a member and president of the Evans School board.

[3] A portion of M-63 in Berrien County was named the "Harry Gast Parkway" in 2008,[6] and the Senate Appropriations Committee room in the Michigan State Capitol was named in his honor in 2015.