Beatrice G. McMillan, 81, who had been active in church and civic organizations here, died Friday at the MarSalle Convalescent Home, where she had lived since 1975. She had arteriosclerosis.

She was the wife of Dr. C. N. McMillan, a dentist here for more than 50 years.

Mrs. McMillan was born in Chocowinity, N.C. She was educated at a private school in Charlotte, N.C., and at Brick Junior College in Enfield, N.C.

She and her husband moved to Washington shortly after their marriage and both became active in the Fifteenth Street Presbyterian Chruch. Mrs. McMillan was a past president of the Women's Association of the church. She also served on the Board of Presbyterians Inc. to Conserve Housing and the Board of Acceptance of the Presbyterian Home.

A talented soprano, she contributed to the musical programs of the church and had been a guest soloist at the John Wesley AME Zion Church.

Mrs. McMillan was a former president of the Ladies Auxiliary of the National Dental Association and a past Worthy Matron of Naomi Chaper No. 9 of the Eastern Star.She had been active in the Rock Creek East Neighborhood League.

She is survived by her husband and a daughter, LaVonne Yahn, both of Washington.