Eva Gordon Bortin, 87, a Washington resident for 70 years who was active in Adas Israel Congregation, died Tuesday at the Chevy Chase Nursing and Convalescent Center in Silver Spring. She had arteriosclerosis.

Mrs. Bortin was born in Bayonne, N.J. She came to Washington in 1909 following her marriage to Dr. Charles Gordon. She and Dr. Gordon, who died in 1937, had been members of the choir at Adas Israel. Mrs. Bortin helped found the congregation's sisterhood.

She also was a founder of the Washington chapter of Hadassah and the Young Women's Hebrew Association, now part of the Jewish Community Center of the Greater Washington Area. She was particularly active in the volunteer work of these and other organizations during the two World Wars.

She was a Red Cross volunteer, a member of the Order of the Eastern Star, and during World War I, a member of the Overseas Jewish Relief Organization.

Mrs. Bortin later married Harry Bortin.

Survivors include a son, Dr. Armand B. Gordon, and a daughter, Lenora G. Abrams, both of Washington; two brothers, Edward Rosenblum, of Washington, and Irving Rosenblum, of Los Angeles; five grandchildren, and seven great-grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to a charity of one's choice.