Gerald William Wiesner, O.M.I., (born June 25, 1937) is a Canadian prelate of the Roman Catholic Church.
He was ordained Bishop of the Diocese of Prince George Feb 22 1993 and retired on Jan 3 2013.
Stephen Arthur Jensen succeeded him as the new Bishop of Prince George.
He taught at Newman Theological College in Edmonton and was named Provincial Superior of the Oblates of St. Mary's Province in Saskatoon in 1984.
He initiated opportunities for adult faith development, oversaw the reorganization of the diocese and resolved its debt.