Mistawasis Nêhiyawak (Cree: ᒥᐢᑕᐚᓯᐢ ᓀᐦᐃᔭᐘᐠ mistawâsis nêhiyawak) is a Cree First Nation band government in Leask, Saskatchewan, Canada.
Their settlement is roughly sixty-eight kilometres west of Prince Albert.
The Nation has one reserve with an area of approximately 125.44 square kilometres.
The First Nation has a registered population of 2171 people as of November 2005 [1].
Mistawasis, or "Big Child" in English, was the first person to sign Treaty 6 in 1876. Notable people of the Mistawasis Nation include Marion Buller, a judge in British Columbia who heads the National Inquiry into Missing and Murdered Indigenous Women.