Arthur H. Jones Jr., 64, a retired employe of the Defense Mapping Agency and a former Army master sergeant, died Thursday at the Yale-New Haven Hospital in New Haven, Conn., following a heart attack. He was striken while attending a family reunion in North Haven, Conn.

Mr. Jones, a resident of Lorton who had lived in the Washington area since 1963, was born in Haverhill, Mass. He enlisted in the army in 1937 and served until 1939. He enlisted again in 1941 and remained in the service until he retired in 1963 with the rank of master sergeant.

He was in Europe during World War II. Subsequent assignments included duty stations in the United States and a various overseas posts. His last job was in Venezuela.

Mr. Jones settled in this area after leaving the Army and took a job with what is now the Defense Mapping Agency, where he was a photographic laboratory technician. He retired a second time in 1979.

Survivors include his wife, Beatrice Forand Jones of Lorton; a daughter, Eileen R. Hash, of Washington; three sisters, Victoria Sawyer of Haverhill, Mass., Roberta Bedsol of Philadelphia, and Phyllis Grosjean of Handcock, N.Y.; and two grandchildren.