Margaret Ann "Peggy" DeMucci, age 83, of Butler, passed away Sunday evening, November 11, 2018, at Butler Memorial Hospital.

Born August 10, 1935 in Butler, she was the daughter of the late John Joseph and Mildred Regina (Megan) O'Brien.

A 1957 graduate of Slippery Rock University, Peggy was employed as a teacher for the Butler Area School District and, later, as an adoption caseworker for Catholic Charities and as a congressional staffer for the U.S. House of Representatives.

She was a member of Saint Paul Roman Catholic Church.

Well known for her volunteer work in the community, Peggy was a past president of the Mental Health Association in Butler County, past president of the Butler branch of the American Association of University Women, and a past chairman of the Slippery Rock University Council of Trustees. She also served on the Slippery Rock University Foundation Board and its Investment Committee.

She is survived by two daughters, Anne Hennon, of Grove City, and Ellen DeMucci, of St Louis, MO; three brothers, Robert "Bob" O'Brien, of Butler, John J. O'Brien, Jr., of Michigan City, IN, and Larry O'Brien and his wife, Patty, of Eugene, OR; one grandson, Luke Samuel Hennon, of Grove City; two nephews, Patrick O'Brien and his wife, Jennifer, of Seattle, WA and Timothy O'Brien, of Eugene, OR.; and three beloved cats, Marggy Mae, Bibby, and Bigger.

She was also close to the Wilson Tirk family, of Butler.

Peggy was preceded in death by her husband, Hector A. DeMucci, who passed away July 29, 2002.

Friends will be received in the Martin Funeral Home, Inc., 429 Center Avenue, Butler on Wednesday from 6 p.m. – 8 p.m.

A Mass of Christian Burial will be celebrated on Thursday at 10 a.m. from Saint Paul Roman Catholic Church, 128 North McKean Street, Butler.

Burial will take place in St. Michael's Cemetery.

The family requests memorial donations to the Society of St. Vincent de Paul Food Cupboard, 146 North Monroe Street, Butler, PA 16001.