Thomas Fremantle, 3rd Baron Cottesloe

Thomas Francis Fremantle, 3rd Baron Cottesloe, 3rd Baron Fremantle (5 February 1862 – 9 July 1956) was a Baron in the Peerage of the United Kingdom and an Austrian nobleman. He was the son of Thomas Francis Fremantle, 2nd Baron Cottesloe and a direct descendant of Admiral Thomas Fremantle.

Baron Cottesloe had a lifelong devotion to the armed forces and as well as commanding the Territorial Army he was also an Honorary Colonel of the Buckinghamshire battalion of the Oxfordshire Light Infantry. He was an expert shot using the rifle and published three books on the subject. He was also on the War Office Small Arms Committee. He shot in the English Eight for twenty seven years and was its Captain from 1920 until his death. In 1911, he was appointed a deputy lieutenant of Buckinghamshire.

He lived at Swanbourne in Buckinghamshire. The house in which he lived is still the home of his descendants today.