Retired Army Col. Lewis B. Tixier, 57, a combat veteran of the Vietnam war who made his home in Washignton from 1965 to 1977, died of a brain tumor Monday at a hospital in Charleston, W.Va.

Col. Tixier commanded a brigade with the Americal Division in Vietnam from 1967 to 1969. Before going to that assignment, he was stationed in Washignton in the Army's Officer Personnel Directorate. After returning from Southeast Asia, he again served in the directorate and with the Joint Chiefs of Staff. He moved to Charleston, W.Va., after retiring from active duty in 1977.

Col. Tixier was a native of Clayton, N.M., and a 1946 graduate of the U.S. Military Academy at West Point. He earned a master's degree in international relations at Georgetown University and was a 1967 graduate of the National War College. In addition to Vietnam, he had been stationed in Korea and Germany. From 1958 to 1961, he taught military history at West Point.

Survivors include his wife, the former Phyllis Byrd, of Charleston; a son, Army Capt. Michael L. Tixier of Fort Hood, Tex.; a daughter, Sally S., of Greensboro, N.C.; his parents, Mr. and Mrs. John B. Tixier of Clayton, and a sister, Carolyn Guier of Louisiana.

The family suggests that expressions of sympathy be in the form of contributions to the New Mexico Boys Ranch, Belen, N.M., 87002.