Luke Andrew Johnsos Sr. (December 9, 1905 – December 10, 1984) was an American football player, assistant coach, and head coach for the National Football League's Chicago Bears franchise. He started with the Bears in 1929 at the age of 23 as an end. He played eight NFL seasons in Chicago finishing his playing career in 1936. He then spent 32 years as a Bears coach, including three as co-head coach during World War II.