Born Marjorie A. Denney in Niagara Falls, she graduated from Niagara Falls High School.
She married George E. Brantigan and they moved to Detroit, where she was an active member of St. Timothy's Lutheran Church, serving as church secretary and teaching Sunday school.
In 1980, she moved with her husband to Pinellas Park, Fla., where she lived until recently.
Mrs. Brantigan was a secretary at Honeywell in Pinellas Park.
She loved sewing and crocheting, and caring for her dog, Tessie.
In addition to her husband of 55 years, survivors include a son, Brian D., and a daughter, Karen A. Kinzly, both of Niagara Falls; three grandchildren; four step-grandchildren; and seven step-great-grandchildren.
Services will be held at 6 p.m. today in M.J. Colucci & Son Funeral Chapel, 2730 Military Road. Entombment will be in Memorial Park Cemetery, St. Petersburg, Fla.