The Assiniboine are a Native American/First Nations people. Assiniboine may also refer to:

  • Assiniboine language, one of the Siouan languages

;Places

  • Assiniboine River, a river that runs through the prairies of Western Canada in Saskatchewan and Manitoba
  • Mount Assiniboine in eastern British Columbia, Canada
  • Fort Assiniboine, Alberta, Canada
  • Fort Assinniboine, Montana, U.S.
  • Winnipeg—Assiniboine, a former Canadian federal electoral district
  • Mount Assiniboine Provincial Park, a provincial park in British Columbia, Canada, located around Mount Assiniboine.

;Ships

  • , River-class destroyer, served 1939–1945
  • , St. Laurent-class destroyer, served 1956–1988

;Schools

  • Assiniboine Community College, community college in Manitoba, Canada

;Other

  • Assiniboine Herald, one of the heralds at the Canadian Heraldic Authority