Edward Huggins Johnstone (born 1922) is a United States federal judge.
Born in Sao Paulo, Brazil, Johnstone was a Sergeant in the 9th Infantry Division in the United States Army during World War II, from 1942 to 1945. He received a J.D. from the University of Kentucky College of Law in 1949. He was in private practice in Princeton, Kentucky from 1949 to 1976, and was the Princeton city attorney from 1952 to 1954. He was a City attorney of Kuttawa, Kentucky from 1954 to 1976 and of Fredonia, Kentucky from 1954 to 1976. He was also a city judge on the Princeton, Kentucky Police Court from 1954 to 1969. He was a judge of the 56th Judicial Circuit Court of the State of Kentucky from 1976 to 1977.
On August 25, 1977, Johnstone was nominated by President Jimmy Carter to a seat on the United States District Court for the Western District of Kentucky vacated by James F. Gordon. Johnstone was confirmed by the United States Senate on October 7, 1977, and received his commission on October 11, 1977. He served as chief judge from 1985 to 1990, and assumed senior status on October 22, 1993.