Roger W. Koster, 81, died at Avantara Nursing Home in Armour on Sunday, August 8, 2021. Funeral services will be on Friday, August 13, at 4 p.m. at Armour Community Church in Armour with burial following in Pleasant Ridge Cemetery in Armour. Visitation will be Thursday, August 12 from 5-7 p.m. at Koehn Bros. Funeral Home in Armour with a prayer service at 7 p.m.