Thomas McKay (July 4, 1849 – 1924) was a Metis farmer and political figure in Saskatchewan, Canada. He represented in the Legislative Assembly of the Northwest Territories from 1891 to 1894 and from 1898 to 1905. McKay was the brother-in-law of Lawrence Clarke, and like Clarke was connected to the Conservative Party of Canada. McKay was a Protestant Métis or Anglo-Metis individual, and was involved in the troubles of 1885 on the side of the federal government. He was one of the first forty men to volunteer to help Major Crozier of the Northwest Mounted Police. He served as an envoy to negotiate with Metis at Duck Lake. He also operated as scout relaying messages between Major Crozier and Colonel Irving. His brother James McKay served with C Company of the Winnipeg Rifles during the 1885 R