William S. Davis, 75, a retired international office with the Textile Workers Union of America, died of respiratory failure Monday in a Gettysburg, Pa., hospital.

A resident of Chevy Chase, he was in the process of moving to a home in Fairfield, Pa., at the time of his death.

Mr. Davis came to Washington in 1968 as a vice president and member of the executive council of the Textile Workers Union of America.He served in the synthetic fibers division here. He retired in 1972.

He was born on a farm in Huntingdon County, Pa., and started work in the early 1930s in a textile mill in Lewistown Pa. He became president and business agent of the Textile Workers Union Local No. 6 in Lewistown in the late 1930s.

Mr. Davis joined the union's international staff in 1948. Although the union has headquarters in New York City, he continued to handle union affairs in Pennsylvania until coming here.

While living here, he was on the board of directors of Concerned Citizens for A Better Government.

His marriage to Freda M. Davis ended in divorce.

Survivors include his wife, the former Edythe Callman Starem, of Chevy Chase; five children by his first marriage, Jesse F., of Reedsville, Pa., Harold N., of Muncy, Pa., William D., of Williamsport, Pa., and Saundra Showers and Patricia Erhard, both of Yeagertown, Pa.; three stepchildren, Michael E. Staren of Gaithersburg, Elliott V. Staren of Bethesda, and John S. Staren of Taunton, Mass.; two brothers, John O., of Burnham, Pa., and Frank M., of Hungtindon, Pa.; 14 grandchildren and five great-grandchildren.