OL may refer to:

• Olympic Games
• Office lady, a low-tier female office worker in Japan
• Old Lawrentians, alumni of St. Lawrence College, Ramsgate, England
• Olympique Lyonnais, a prominent French football club
• Optics Letters, the journal published by the Optical Society of America
• Offensive Lineman, a player who plays on the offensive line of scrimmage in American football
• OL is a USCS symbol for organic silt and/or clay
• Ostfriesische Lufttransport (IATA code: OL), a scheduled and charter airline based in Emden in Germany
• Ol Chiki script
• Ol is the standard abbreviation for Oulu railway station, Finland
• OL!, a non-political youth organization in Azerbaijan
• -ol, the suffix of chemical compounds that are alcohols
• ol, an HTML element for creating ordered lists

da:Ol de:OL fr:OL ko:OL it:OL ja:OL (?????) fi:OL zh:OL