Nick G. Sibbeston (born November 21, 1943) is a Canadian retired politician, serving from 1985 to 1987 as the fourth premier of the Northwest Territories. Sibbeston was a Senator representing the Northwest Territories from 1999 until 2017, when he resigned on his 74th birthday, a year prior to reaching the mandatory retirement age. He was also a Member of the Legislative Assembly in the Northwest Territories representing from 1970 to 1975 and from 1979 until 1991.