Major General Ann Lena Hallin née Larsson[1] (born 26 March 1961) is a retired Swedish Air Force officer.

In 1992, Hallin attended the Staff Officer Course of the Swedish National Defence College and she served as head of HR Unit at Jämtland Wing (F 4).

[5] There she served as administrator for all military personnel within the wing, responsible for recruitment, supervision and employment during peacetime.

[8] In 2013, Hallin was promoted to brigadier general and appointed head of management system in the Swedish Armed Forces.

She was also responsible for the implementation of the operations assignments in the Command and Control Regiment, the Swedish Armed Forces Network and Telecommunications Unit (Försvarsmaktens telenät- och markteleförband, FMTM) and the Swedish Armed Forces Intelligence and Security Centre (Försvarsmaktens underrättelse- och säkerhetscentrum, FMUndSäkC), as well as for the acquisition of the relevant material systems, but also led the Swedish Armed Forces frequency management, weather service and geographical information service.

[4] From October 2013 to June 2016, Hallin was head of the Swedish Defence Research Agency (FOI)'s Division of C4ISR (Command, Control, Communications, Computers, Intelligence, Surveillance and Reconnaissance) and from July 2016 and almost three years after that, she conducted International Studies/Security Policy at the Royal College of Defence Studies in the United Kingdom.

[8] She was succeeded by Lieutenant General Thomas Nilsson in 2023 and retired from the Swedish Armed Forces.