Helmut "Mike" Ajango (November 30, 1931 – November 15, 2013) was an Estonian-born architect based in Fort Atkinson, Wisconsin in the United States. He designed more than 175 churches in southern Wisconsin as well as Fireside Dinner Theatre (1964) and The Gobbler. His work has been described as combining Mid-Century Modern architecture and Prairie Architecture. Fellow Fort Atkinson architect Gene LaMuro worked with Ajango on some of his projects.