Emmet Andrews, 65, general president of the 320,000-member American Postal Workers Union from 1977 to 1980 and a member of the executive council of the AFL-CIO for three years before retiring in August 1980, died Sunday in a hospital in Walnut Creek, Calif., after a stroke.

He came to Washington in 1966 as the union's executive aide. In 1972, he was elected industrial relations director. He held that post until May 1977, when he was elected general president to fill the unexpired term of Francis S. Filbey, who had died in office. He was elected to a full term in 1978, but was defeated for reelection in 1980.

Mr. Andrews was a native of San Francisco, where he went to work for the Post Office Department as a postal clerk in 1936. He rose through the ranks of the old National Federation of Post Office Clerks and was named national vice president of the San Francisco region in 1956, a post he held until coming to Washington.

A resident of Walnut Creek, he had lived in Silver Spring during his years with the union in Washington.

Survivors include his wife, Betty, and a daughter, Catherine Maurer, both of Walnut Creek, and two grandchildren.