Sir Alfred William Flux, CB (8 April 1867 – 16 July 1942) was a British economist and statistician.

Flux was born in the Landport district of Portsmouth in 1867, the son of a cement maker.

[1] He attended Portsmouth Grammar School then studied mathematics at St John's College, Cambridge, where he was a Senior Wrangler in 1887[2] (sharing the honour in a tie with three others).

Flux returned to London in 1908 to take up a post as advisor to the Commercial, Labour and Statistics Department.

[1] The Royal Statistical Society awarded him the Guy Medal in Silver in 1921 and in Gold in 1930.