Isabel Douglas Rein, 91, a longtime Arlington resident who had been active in church and volunteer groups, died of respiratory failure Sept. 2 in Falls Church at Goodwin House West, where she had lived since 1997.

She was a past president of the Episcopal Women of the Diocese of Virginia.

She had helped found the Goodwin House retirement homes and served on the Bishop's Committee on the Status of Women and on the Overseas Mission Society. She had been a trustee of St. Andrew's Episcopal Church in Arlington and had organized groups at St. Mary's Episcopal Church in Arlington for volunteer work at St. Elizabeths Hospital.

Mrs. Rein, a native of Lonaconing, Md., lived in Arlington for 45 years before moving to Syracuse, N.Y., where she lived from 1989 to 1997. She was a 1931 graduate of Western Maryland College.

She had helped develop the Volunteer Council at St. Elizabeths. As a Red Cross gray lady, she had been active in providing recreational therapy to hospital patients for more than 20 years. During World War II, she served as Red Cross captain in charge of canteens at Fort Myer.

She was the recipient of a meritorious service award from Western Maryland College, where she had served on the board of governors and as her class's alumni secretary.

Her husband, William C. Rein, died in 1981. Survivors include a son, Mac Eason Rein of Bethesda; a daughter, Ellen Douglas Slater of Reston; three grandchildren; and two great-grandchildren.