Mac D. Mills, 61, a retired Army master sergeant who later worked for the Jacobs Transfer Co. at the Goddard Space Flight Center, died Thursday at the Loch Raven Veterans Hospital in Baltimore. He had a liver ailment.

Mr. Mills was born in Florence, Ala., and grew up in Adamsville, Tenn., and moved to the Washington area in 1940. He entered the Army in 1942 and served in Europe in World War II. He later served in Japan and in Korea during the conflict there. He was stationed at the Aberdeen Proving Ground in Maryland when he retired from the military service in 1963.

A former resident of New Carrollton and Cheverly, he was with the Jacobs Transfer Co. until retiring for a second time about five years ago.

Mr. Mills had been active on the PTA executive committees of the Carrollton Elementary School, the Charles Carroll Junior High School, the Bladensburg Junion High School and Bladensburg Senior High School.

Survivors include his wife, Rina of Lanham, a son, Michael, also of Lanham; a daughter, Terry Kidwell of Woodbridge, Va.; five brothers, John C. Jr. of Hindsville, Ark., Louie E. of Parksley, Va., James N. of Hazlet, N.J., Robert L. of Seabrook, and Joe F. of Lanham; and a sister, Kathryn Vaughan of Seabrook.