Thomas Deitz McKeown (June 4, 1878 – October 22, 1951) was a U.S. Representative from Oklahoma.

He moved to Ada, Indian Territory (now Oklahoma), in 1901 and resumed the practice of law.

For the years 1935 and 1936, McKeown moved to Chicago, Illinois, and resumed the practice of law.

He returned to Ada, Oklahoma, in 1937 and engaged in farming and oil production.

McKeown died in Ada, Oklahoma, on October 22, 1951 (age 73 years, 140 days).