Acaster Lake is named in honour of Leading Seaman Douglas Haig Acaster. The lake was dedicated on September 6, 1951 by the Government of Saskatchewan.

Douglas Haig Acaster was born at Beausejour, Manitoba in March 1918. Following his studies he was employed as a teacher in the North Battleford, Saskatchewan area before enlisting in June 1939. He was assigned as a cook to HMCS CHIPPEWA, the RCNVR unit at Winnipeg, when he died of leukemia on July 13, 1944. He is buried in North Battleford.