Theresa M. Keller, 86, of Butler, passed away Thursday, March 13, 2025, at Good Samaritan Hospice House in Wexford.

Born Sept. 14, 1938, in Grove City, she was a daughter of the late Anthony John Keller and Rita Jane Fitzgerald Keller.

During her working career, Theresa was employed as a secretary at Pangborn Abrasives, Spang & Company, and Butler County Community College.

She was a member of All Saints Parish, St. Michael the Archangel Roman Catholic Church.

She volunteered at Butler Memorial Hospital and with the Greenwood Village Robinettes Drum and Baton Corps.

She was also an avid Pittsburgh Steelers fan.

Theresa is survived by two siblings, Betty Kay and her husband, Bert, of Grove City, and Anthony "Butch" Keller; and numerous nieces, nephews, great-nieces and nephews; and great-great nieces and nephews.

In addition to her parents, she was preceded in death by two sisters, Laraine McMurdy and Carol Fornelli.

Friends will be received in the Martin Funeral Home, 429 Center Ave., Butler, on Monday from 4 p.m. – 7 p.m.

A Mass of Christian Burial will be celebrated on Tuesday at 10 a.m. at All Saints Parish, St. Michael the Archangel Roman Catholic Church, 432 Center Ave., Butler, with the Rev. John J. Baver officiating.

Burial will take place in West Sunbury Union Cemetery.