Thomas M. Walsh, 84, board chairman of the Thomas D. Walsh realty company of Washington who was a former savings and loan vice chairman and a past president of both the Metropolitan Washington Board of Trade and the Washington Board of Realtors, died Nov. 30 at Sibley Memorial Hospital after a stroke.

He became president of Walsh realty, founded by his father in 1908, after serving in the Army in Europe in World War II. He stepped down as president in 1972 to become a vice chairman of the National Permanent Federal Savings & Loan, then the city's second-largest savings and loan institution.

He retired from National Permanent in 1983 and served as board chairman of the realty company until his death. He had also served as president of his own insurance company and had served on the board of McLachlen National Bank.

Mr. Walsh was Board of Trade president in 1970 and was named its man of the year in 1972. He was Board of Realtors president in 1964 and its man of the year in 1966.

He was a past chairman of the D.C. Convention and Visitors Bureau and a past president of the Merrick Boys Camp of Washington. A knight of Malta, he was a past president of the Friendly Sons of St. Patrick in Washington.

Mr. Walsh, a Washington native and resident, was a graduate of St. Anthony's High School in Washington and a 1942 graduate of Catholic University's law school.

His first wife, the former Joan Murphy, died in 1961.

Survivors include his wife, the former Julia Montgomery, of Washington; seven children from his first marriage, Joan Cassedy of Chevy Chase, Thomas D. Walsh of Steamboat Springs, Colo., Anne Walsh of Cleveland, and Kate Carr and Patrick J., Daniel E., and Mary Frances Walsh, all of Washington; a daughter from his second marriage, Peggy Cornog of Winnetka, Ill.; four stepsons, John and Stephen Montgomery, both of Washington, and Michael and Mark Montgomery, both of New York; a brother, Edward J. Walsh of Fairfax; 19 grandchildren; and two great-grandchildren.