Commander Youngblood was born on 17 November 1907, in Benlomand, Arkansas, the son of the late E. Walter Youngblood and Mrs. Mary Lucy (Dulaney) Youngblood. He attended the University of Arkansas at Fayetteville, Arkansas, receiving his Bachelor of Science degree in Business Administration in 1933 and his Doctor of Laws degree in 1935. Appointed a Lieutenant (junior grade) in the US Naval Reserve on 21 April 1941, he attained the grade of Commander to date from 20 July 1945. On 7 August 1946, he transferred to the US Navy in the permanent rank of Lieutenant (junior grade).
Following his appointment in 1941, Commander Youngblood served as Assistant Administrative Officer at the Naval Proving Ground, Dahlgren, Virginia, and in June 1944 assumed the duties of Administrative Officer. He remained in that capacity until February 1946, when he was assigned to the Office of the Judge Advocate General, Navy Department, Washington, DC. Transferred to the Office of the Under Secretary of Navy, Navy Department, in February 1946, he continued in that assignment until May 1947. Thereafter he served as Special Assistant to the Secretary of the Navy, Navy Department. He was then under orders to report to the Commandant, Fifteenth Naval District for duty as District Legal Officer.
Commander Youngblood had the American Defense Service Medal, the American Campaign Medal and the World War II Victory Medal.
His residence was in Little Rock, Arkansas and he married the former Miss Rubye Olson of Shelby, Montana, and they had one daughter.
Commander Youngblood was a member of the Bar of Arkansas and had been admitted to practice in the Federal Courts of Arkansas and the Supreme Court of the United States. In civil life he was a Legal Clerk and practiced law predominantly in the fields of taxation, real estate and insurance from 1933 to 1934. During 1936 he served as Administrative Assistant to the Regional Director for Arkansas, Louisiana and Mississippi in charge of sub-marginal land purchase programs of the Reestablishment Administration. Between 1937 and 1941, prior to his appointment in the US Naval Reserve, he was serving as an Attorney for the Federal Security Agency, Washington, DC. He passed away on 9 August 2004 and is buried in Arlington National Cemetery.