MCL may refer to:
Medicine Mantle cell lymphoma Mast cell leukemia Medial collateral ligament Medical Center Leeuwarden Microlitre (μL), or microliter Midclavicular line Mucocutaneous leishmaniasis Multiple cutaneous leiomyoma Myeloid cell leukemia sequence 1 (MCL1)
Companies and organizations MCL Cafeterias, a chain of American cafeteria-style restaurants Mahanadi Coalfields Limited, a coal-producing company in India Marine Corps League Movement for Christian Liberation Malabar Cements Limited a cement company in Kerala Mysore Cements Limited a cement company
Science, engineering and industry Maximum contaminant level, standards that are set by the United States Environmental Protection Agency for drinking water quality Mid-Canada Line of early-warning radar stations
Computer Science and mathematics 1150 in Roman numerals Macintosh Common Lisp McLaughlin group (mathematics), a sporadic simple group Monte Carlo localization Multicollinearity
Other uses Michigan Compiled Laws Minecraft Legends, a Minecraft spin-off Maltese Challenge League, second division association football league in Malta Master of Comparative Law, an advanced degree offered by some law schools