The Loir is a river in France.
Loir may also refer to: Loir en Vallée, a commune in northwestern France Adrien Loir (1862–1941), French bacteriologist Caroline Loir (born 1988), French canoeist
Artists Luigi Loir (1845–1916), French painter, illustrator and lithographer, known for ceiling paintings and landscapes Marianne Loir (c.1715–1769), French portrait painter Nicolas-Pierre Loir (1624–1679), French painter and engraver of religious and historical allegories