Marguerite Breyfogel Schnabel, 84, a resident of the Washington area for 50 years who was active in church and volunteer work, died Saturday in a hospital in Syracuse, N.Y., following a heart attack.

Mrs. Schnabel was born in Reading, Pa. She graduated from Albright College there and later did social work in Reading and was secretary to her father, Bishop S. C. Breyfogel of the Evangelical Church. She moved to Washington in 1926 when her husband, the Rev. George E. Schnabel, became pastor of the Albright Evangelical United Brethren Church, now the United Methodiest Church.

In 1951, the couple moved to Arlington when Mr. Schnabel became pastor of St. Mark's United Methodist Church. They remained in Arlington until 1976, when they moved to Syracuse to live with a daughter, Margo Koten.

Mrs. Schnabel had been active in the Arlington County Republican Club, the Arlington Neighbors Club, and Church Women United. She also worked for the Evangelical United Brethren Conference and was particularly interested in its religious education programs.

Besides her husband, who resides with Mrs. Koten in Syracuse, survivors include two granddaughters.

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