LCO

LCO may refer to:

• Lac Courte Oreilles Band of Lake Superior Chippewa Indians
• Lague Airport's IATA airport code, Republic of the Congo
• Las Cachorras Orientales, a Japanese professional wrestling tag team
• Las Campanas Observatory, an astronomical observatory in Chile
• Launch Control Operator/Officer
• Lawn Care Operator
• League of Legends Circuit Oceania
• Legislative Competence Order
• Libraries Connect Ohio
• lipochitin oligosaccharide / lipo-chitin oligosaccharide
• Lithium cobalt oxide, a cathode material for lithium-ion batteries
• Lithuanian Chamber Orchestra
• Local Cable Operator, resell for multiple-system operator
• London Chamber Orchestra
• London Contemporary Orchestra