The Rev. George C. Weiser, 82, pastor emeritus of St. Michael's Episcopal Church in Arlington and an assistant to the rector of Grace Episcopal Church in Alexandria, died Wednesday in Alexandria Hospital after a heart attack.

Dr. Weiser organized the congregation of St. Michael's beginning in 1947 after having served churches in Minnesota, Michigan and Iowa. After the death of his first wife, Irene, in 1954, he then served churches in Kansas City, Mo., and Rogers, Ark.

In 1959, he returned to Northern Virginia and was rector of Cedar Run Parish in Casanova until 1965, when he became an assistant to the rector of Grace Episcopal Church. It was during these years that he was named pastor emeritus of St. Michael's.

Dr. Weiser was born in Windom, Minn. He graduated from the University of Minnesota School of Dentistry in 1919 and for the next 10 years practiced dentistry in St. Paul.

He decided to become a minister and graduated from the old Seabury School of Theology in Fairbault, Minn., now Seabury-Western Theological Seminary in Evanson, Ill. He was ordained on May 23, 1929, and began his ministry at St. Peter's Church in St. Paul.

A Mason since 1938, Dr. Weiser was a member of Kena Temple in Fairfax and recently completed a term as high priest of the Triangle Royal Arch Chapter No. 73 in Arlington. He also was a member of the Old Dominion Knights Templar, Commandery No. 11, in Alexandria. He was a resident of Goodwin House in Alexandria.

Survivors include his wife, the former Peggy Paepper, whom he married in 1957, of Goodwin House; one daughter, Mrs. James Peck of Austin, Minn.; three sons, John C., of Kent, Ohio, F. Robert, of Fairfax, and G. Thomas, of Vienna; one sister, Helen Weiser of Windom; 10 grandchildren, and one great-grandchild.

The family suggests that expressions of sympathy be in the form of contributions to Grace Episcopal Church or to the Goodwin House Fellowship Fund.