Flambeau may refer to:
- A burning torch, especially one carried in procession
- Flambeau (character), a character in G. K. Chesterton's Father Brown stories
- The Flambeau River, in northern Wisconsin
- Flambeau, Rusk County, Wisconsin
- Flambeau, Price County, Wisconsin
- The former Chicago and North Western Flambeau train service, later renamed the Flambeau 400
- Flambeau, Inc., owner of Duncan Toys Company
- Flambeau, one of the founding members of the Order of Hermes in the game Ars Magica
- Flambeau, lighted torches used to illuminate floats in Mardi Gras parades in New Orleans
- Flambeau, a flame fed by natural gas on early natural gas wells to show that the gas was flowing
- Flambeau butterfly, Dryas iulia
See also: Lac du Flambeau