Harold Dunn Barnhart, 88, of Mount Chestnut passed away on Wednesday, June 9, 2021 at home surrounded by his loving family. He was born in Butler on May 14, 1933 to the late Richard and Catharine (Dunn) Barnhart. Harold retired from Armco after decades of employment. He enjoyed camping, fishing and woodworking, but above all else he loved to collect and tinker with antique International Tractors. He was loved and will be forever missed. He was the loving husband of Pat Barnhart whom he was married to for 63 years; father of Randall (Kelly) Barnhart, Sandra Barnhart, Lisa (Scott) Marx, and Karen (John) Hanchosky; brother of Deanna Cawthorne. Harold is also survived by his grandchildren Rebecca, Tyler, Kaitlyn, Kyle, Anthony, Corey, Collin, and Courtney. He was preceded in death by his brother Gary Barnhart and his beloved grandson Bryan Barnhart. Arrangements through the SPENCER D. GEIBEL FUNERAL HOME & CREMATION SERVICES, 140 NEW CASTLE RD, BUTLER, PA 16001, WWW.SPENCERDGEIBEL.COM. In lieu of flowers, donations may be made in Harold's name to the Shriners Hospital for Children of Erie, PA.