Stephen S. Jackson, 82, a longtime Pentagon official who retired in 1970 as deputy assistant secretary of Defense for manpower, died Saturday in the Perryville Veterans Administration Hospital at Perry Point, Md. He had arterioscelorosis.

Mr. Jackson came to Washington in 1950 as a consultant to the Senate Commerce Committee. Later that year he joined the Defense Department and spent the next six years as assistant general counsel in the Office of the Secretary of Defense.

In 1956, he was named special assistant to the assistant secretary of Defense for manpower. Mr. Jackson became deputy assistant secretary about a year later.

He was the recipient of two meritorious and one distinguished civilian service awards from the Defense Department.

Mr. Jackson was a native of Springfield, Mass., and lived in Northern Virginia for about 20 years before moving to Silver Spring. He was a member of the Knights of Columbus and the John Carroll Society.

He graduated cum laude from Holy Cross College in 1921 and from Harvard University Law School in 1927. He was a veteran of World War I.

Between 1929 and 1944, he lived in New York City, where he was a referee in the state's workmen's compensation bureau and a justice of the city's domestic relations court. He then went into the private practice of law. In 1948 and 1949, he was acting director of the Motion Picture Production Code.

Survivors include his wife, the former Ruth Linson, of Silver Spring; a son, Stephen S. Jr., of Tampa, Fla.; a daughter, Martha J. Clarke of Washington; seven grandchildren, and one great-grandchild.