OLC

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


 * Oak leaf cluster, a military decoration
 * Office of Legal Counsel in the U.S. Department of Justice
 * Ohio Library Council, professional association for librarians in Ohio
 * 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