List of last surviving World War I veterans by country

The last living veteran of World War I was Florence Green. She was a British woman who served in the Allied armed forces, and who died on 4 February 2012, aged 110. The last veteran who served in combat was Claude Choules. He served in the British Royal Navy (and later the Royal Australian Navy) and died 5 May 2011, aged 110. The last veteran who served in the trenches was Harry Patch who died on 25 July 2009, aged 111. The last Central Powers veteran was from Austria-Hungary. He died on 27 May 2008 at the age of 107.
The total number of people who took part in WWI is estimated by the Encyclopædia Britannica at 65,038,810. There were around 9,750,103 military deaths during the conflict.
By branch.
This is the list of the last living veterans of World War I by the country and the branch that they served: