Kalu or Kaloo may refer to:

• Kalu, Bostanabad, a village in Bostanabad County, East Azerbaijan Province
• Kalu, Varzaqan, a village in Varzaqan County, East Azerbaijan Province
• Kalu, alternate name of Gol Chul, a village in Varzaqan County, East Azerbaijan Province
• Kalu, Gorgan, a village in Gorgan County, Golestan Province
• Kalu, Ramian, a village in Ramian County, Golestan Province
• Kalu, Hormozgan, a village in Hormozgan Province
• Kalu, Dargaz, a village in Dargaz County, Razavi Khorasan Province
• Kalu, Kalat, a village in Kalat County, Razavi Khorasan Province
• Kalu, Takht-e Suleyman Massif, a summit in Takht-e Suleyman Massif

• Kalu, Afghanistan
• Kalu, Rajasthan, a village in Lunkaransar Tehsil, Bikaner district, India
• Kalu river, a river in Sri Lanka
• Kalu (woreda), a district in Ethiopia

• Kalu (name)
• KALU, an American radio station

• Kalow (disambiguation)
• Kolu (disambiguation)