[3] It is within Alberta's County of Vermilion River and Saskatchewan's Rural Municipality of Frenchman Butte No.
Both reserves once maintained separate band governments, combining to form Onion Lake in 1914.
With all reserves combined, the Onion Lake Cree Nation has a total land area of 585.711 square kilometres (226.144 sq mi), and has 6,475 registered members (as of August 2019).
[5] A widely seen First World War propaganda poster shows Moo-Che-We-In-Es of the Onion Lake Cree Nation making a $1.50 donation to the Canadian Patriotic Fund with a cover letter in Western Cree syllabics.
When referring to the community today, though, Cree speakers typically use wîhcekaskosîwi-sâkahikanihk, "[domestic] onion lake".