A funeral Mass for Dean C. Koppen, 77, of Spencer, will be held Tuesday, June 30, 2026, at 11:00 AM at Sacred Heart Catholic Church in Spencer. His family will greet friends one hour prior to the Mass at the church on Tuesday. Graveside inurnment will the held-on Tuesday at 3:00 PM at Sacred Heart Catholic Cemetery in Ledyard. Oakcrest Funeral Services of Algona is in charge of arrangements.