Carlos Arturo Lett (November 4, 1885 - March 8, 1956) was an Argentine footballer who played as forward.

Lett played most of his career in Alumni (where he won 16 titles) and the Argentina national team.

[4] With the Argentina national team Lett debuted on 15 August 1905 in a Copa Lipton match against Uruguay.

[6] Lett served with the Royal Field Artillery in World War I including seeing action in the Palestine Campaign in 1917–1918.

In October 1918 Lett married Valerie Helen Stears (21 March 1898 - 21 September 1941) and the couple had 7 children and they all lived between Argentina & England over the years.