Ethel D. Allen (May 8, 1929 – December 16, 1981) was an African-American politician and physician from the Republican Party, who served as the Secretary of the Commonwealth of Pennsylvania under governor Dick Thornburgh for 10 months, between January and October 1979. Prior to serving in the state cabinet, Allen was a member of the Philadelphia City Council from 1972 until 1979, representing both the 5th and At-Large Districts.