Sir Charles William Chadwick Oman, KBE, FBA (12 January 1860 – 23 June 1946) was a British military historian.

Oman was born in Muzaffarpur district, India,[1] the son of a British planter, and was educated at Winchester College and at the University of Oxford, where he studied under William Stubbs.

Among his teaching activities at Oxford, he taught the special subject in military history with C. T. Atkinson of Exeter College that focused on the Peninsular War.

Oman's academic career was interrupted by the First World War, during which he was employed by the government's Press Bureau and the Foreign Office.

Oman was the Conservative Member of Parliament for the University of Oxford constituency from 1919 to 1935, and was knighted KBE in the 1920 civilian war honours list.