John Mlacak (February 27, 1936[1] – September 19, 2014) was a Canadian politician and painter.
Mlacak was born in 1936 in Windsor, Ontario, the son of Croat immigrants.
After his education, he began working for the Northern Electric Company, which later became Nortel.
During his career, he also served as a commissioner with the National Capital Commission and was on the planning committee for the Regional Municipality of Ottawa-Carleton.
He co-founded the Kanata Civic Art Gallery and one of his works was featured in the Croatian Embassy.