Thomas Anthony Lewis, OAM (born 1958) is an Australian author, popular military historian, public speaker, and former naval officer.

An author since 1989, Lewis worked as a high school teacher, and served in the Australian armed forces for 20 years, seeing active service in Baghdad during the Iraq war, and working in East Timor.

[1][2] After reconstituting the Royal Australian Naval College Historical Collection, with which his Order of Australia is largely connected, Lewis was the Director of the Darwin Military Museum from 2009 until April 2014, when he took up full-time research on several World War I and II projects.

Lewis is the author or co-author of 22 books, all of which are popular works of military history except for one which charts the Tasman Bridge disaster – he was raised largely in Tasmania, although born in London.

His most recent works are The Sinking of HMAS Sydney: Living, Fighting and Dying in WWII cruisers(Big Sky, 2023) and Cyclone Warriors - the Armed Forces and Cyclone Tracy (Avonmore, 2024, for the 50th commemoration of the 1974 disaster) From 2013-2020 Lewis was the Chairman of the Order of Australia Association (NT).