FOST may refer to: Force océanique stratégique, the strategic submarine forces of the French Navy. Flag Officer Sea Training (India) in the Indian Navy Flag Officer Sea Training (Pakistan) in the Pakistani Navy Flag Officer Sea Training (United Kingdom) in the Royal Navy (United Kingdom) Future of StoryTelling, an annual summit
Fost may refer to: Fošt, a settlement in northeastern Slovenia Sant Fost de Campsentelles, a village in the province of Barcelona, Spain Ingrid Föst (born 1934), a German gymnast