Sir Charles William Cayzer, 3rd Baronet (6 January 1896 – 18 February 1940) was a British Conservative Party Member of Parliament (MP). He was the son of Sir Charles William Cayzer, 2nd Baronet, of Gartmore, whom he succeeded in 1917. He was educated at Repton School, Oriel College, Oxford and the Royal Military College, Sandhurst, and was a Lieutenant in the 19th Royal Hussars from 1915 to 1919, serving in France from 1916 to 1918. He was re-employed at the start of World War II as Captain in the 15th/19th Hussars.