Kenneth Ray Redmon, 51, a former owner and operator of Springfield Yellow Cab Inc. and a retired master sergeant in the Air Force, died of cancer Monday at the Bethesda Naval Medical Center. He lived in Alexandria.

Mr. Redmon, who was born in Warren County, Va., lived in Front Royal, Va., until he joined the old Army Air Forces, later the Air Force, in 1946. In 1968, he retired with the rank of master sergeant and moved to the Washington area.

He bought Springfield Yellow Cab after leaving the military and operated the firm until 1980, when he sold it because of failing health.

Mr. Redmon was a member of the Asbury Methodist Church in Front Royal. He also was a member of Post No. 7327 of the Veterans of Foreign Wars and a past commander of Post No. 176 of the American Legion, both of which are in Springfield.

Survivors include his wife, Christine P., of Alexandria; six children, Kenneth R. Jr., Jeffrey A., David E., Deborah A. and Linda L., all of Alexandria, and Justin D., of Springfield; two sisters, Evelyn Henry of Sterling, Va., and Gladys Yawornicky of Springfield; his stepmother, Lucille Redmon of Front Royal; two half-sisters, Nina Burke and Susan Conner, also of Front Royal, and one grandchild.