OLC is a three-letter acronym (TLA) that may refer to:

• Oak leaf cluster, a military decoration
• Office of Legal Counsel in the U.S. Department of Justice
• Online Contest (gliding), a glider, hang glider, and paraglider soaring competition
• Online creation, a software feature in MUDs that allows editing the world while interacting with it
• Online Learning Consortium, a professional organization promoting online education
• Open Location Code, a system for identifying a place on Earth
• Open-loop controller, a system controller that does not use feedback
• Optical lattice clock, a type of optical atomic clock
• The Oriental Land Company

• Wet Spot
• Wet stacking
• Wet standpipe
• Wet (Streisand album)
• Wet sub
• Wetsuit boots
• Wetsuweten first nation
• Wettability
• Wet tail
• Wet tar
• Wetted
• Wetted area
• Wetted perimeter
• Wettekind
• Wettenberg
• Wetten, dass
• Wetten, dass...
• Wetten, daß
• Wettengel Rugby Field
• Wettenhall
• Wettenhausen Abbey
• Wetterau
• Wetter (Hesse)
• Wetter (Hessen)
• Wetterhoun