Voisin (French for "neighbour") may refer to:
Companies Avions Voisin, the French automobile company Voisin Laboratoire, a car manufactured by Avions Voisin Voisin (aircraft), the French aircraft manufacturer Voisin, a Lyon-based chocolatier, owned by the Boucaud family, which manufactures Coussin de Lyon
Buildings Château de Voisins (Louveciennes), French palace
People Voisin (surname)