Auk or AUK may refer to:

• Auk, a type of bird
• The Auk, now Ornithology, an American ornithological journal
• "The Auk", nickname of Claude Auchinleck (1884–1981), British field marshal
• Auk oilfield, near Aberdeen, Scotland

• Agriculture University, Kota, Rajasthan, India
• The American University of Kurdistan, Dohuk, Iraq
• American University in Kosovo, part of the Rochester Institute of Technology
• American University of Kuwait, a non-profit university in Kuwait

• AUK CORP, a Korean semiconductor and optoelectronic manufacturer
• AETN UK, a joint venture of A&E Television Networks and British Sky Broadcasting
• Audax UK, a cycling organisation
• AUK, IATA code for Alakanuk Airport in the Kusilvak Census Area, Alaska
• AUK, a shortening of the name of modern Heathen organisation based in the United Kingdom, Asatru UK

• AWK (disambiguation)