Lub

Lub or LUB may refer to:


 * Supremum, least upper bound
 * Lub, Oman
 * Liga Uruguaya de Basketball (LUB)
 * Liub (also known as Lub), a 9th-century ruler of Veleti tribe
 * Lumid Pau Airport (IATA: LUB), an airport serving the village of Lumid Pau, Upper Takutu-Upper Essequibo Region. Guyana