Idaho
- Arbon
- Bellevue ("Beautiful View")
- Blanchard (French surname)
- Boise (from boisé, "Wooded")
- Bonneville County (named after Benjamin Louis Eulalie de Bonneville (1796–1878), a French-born officer in the United States Army, fur trapper and explorer)
- Bovard
- Bruneau (French surname)
- Butte ("Hill")
- Cache
- Coeur d'Alene ("Heart of the Awl")
- Culdesac ("Dead End")
- Dubois ("of the wood")
- Fremont County
- Grandjean
- Grangeville ("barn city")
- Jacques
- Labelle
- Laclede
- La Fleur ("the Flower")
- Malad City (from malade, French for "sick")
- Michaud (French surname from Michel (Michael))
- Montour
- Montpelier
- Nez Perce County (from the Nez Perce Tribe's name "nez percé" meaning "pierced nose")
- Paris
- Payette (named after François Payette)
- Pierre's Hole
- Ponderay (from pend oreille, "earring")
- Simplot
- St. Maries
- Teton ("Teat")
- Thiard
Read more about this topic: List Of U.S. Place Names Of French Origin