ALI may refer to:

• Acer Laboratories Incorporated, a manufacturer of integrated circuits
• Acute limb ischemia, a condition caused by sudden lose of blood flow to a limb
• Acute lung injury, a lung injury caused by inflammation
• Albion (Amtrak station), Michigan, USA, Amtrak station code
• Alice International Airport, Texas, from its IATA airport code
• American Law Institute
• Annual limit on intake, a limit in radiation dosimetry
• Automatic Location Information, a database which is maintained on behalf of local governments by contracted private third parties generally the Incumbent Local Exchange Carrier (ILEC) for use primarily in E911 applications.

ALi Corporation (also known as Acer Laboratories Incorporated or Acer Labs Inc., and commonly known as ALi) is a major designer and manufacturer of embedded systems integrated circuits, and a former manufacturer of personal computer integrated circuits. It is a subsidiary of the Acer group.

Ali ibn Abi Talib (; , ; 13 Rajab, 21 BH – 21 Ramadan, 40 AH; 15 September 601 – 29 January 661) was the cousin and son-in-law of the Islamic prophet Muhammad, ruling over the Islamic caliphate from 656 to 661.