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 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.

Alì is a comune (municipality) in the Province of Messina in the Italian region Sicily, located about east of Palermo and about southwest of Messina. As of 31 December 2004, it had a population of 900 and an area of .

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.

Onela was according to Beowulf a Swedish king, the son of Ongentheow and the brother of Ohthere. He usurped the Swedish throne, but was killed by his nephew Eadgils, who won by hiring foreign assistance.