Lillian A. Mitchell, 85, a retired government employe who was active in civic and scouting organizations, died of Parkinson's disease Saturday at the Magnolia Gardens Nursing Home in Lanham.

She had been a resident of Magnolia Gardens for the past 11 years.

Mrs. Mitchell worked as an auditor with the General Accounting Office for 15 years before retiring in 1956. Prior to joining the GAO, she worked for about 8 years in the procurement division of the Treasury Department.

She was born in Woodbridge and moved to Washington at an early age. She was a graduate of the old Business High School.

During the 1920s, she helped organize Girl Scout troops in Northeast Washington and testified before Congress for additional playgrounds. She also became a notary public.

Mrs. Mitchell moved to Greenbelt in 1937, helped organize some of the first Brownie and Girl Scout troops in the area and became a charter member of the Greenbelt Community Church.

In 1945, she was given an award by the Greenbelt High School PTA for her 25 years of service to PTAs in Washington and Maryland.

She was a member of the Order of the Eastern Star.

She was the widow of Martin F. Mitchell, a Post Office Department official, who died in 1932.

Mrs. Mitchell is survived by a son, Edwin J., of Silver Spring; two daughters, Norman E. Anders, of Seabrook, Md., and Shirley A. Walker, of Ridgewood, N.J.; 11 grandchildren, and 10 great-grandchildren.