Robert E. Koeller, age 80, died Sunday, September 13, 2015, at Mercy Medical Center in Oshkosh. Robert was born September 13, 1935, the son of Harvey and Bernice Koeller. He married Carol Margraf on February 15, 1958, at St. Joseph's Church in Green Bay. Robert was an avid bingo player, who enjoyed trips to the casino and traveled extensively with Carol.Robert is survived by his children; Rick (Sheila) Koeller, Steve (Dee) Koeller and Kevin Koeller, all of Oshkosh; one brother, David Koeller of Green Bay; one sister, Germaine Rusch, of Green Bay. He was grandfather to Michael (Katy), Amanda and Keely and great grandfather to Trenton and Maverick. He is further survived by numerous nieces and nephews. Preceding him in death were his wife Carol, parents and brother, Jerry. Visitation will be held on Thursday, September 17, 2015 at Lake View Memorial Park, 2786 Algoma Bvld., Oshkosh, from 11:00 am until the funeral service at 12:00 pm, with a graveside service to follow.