Somerset John Gough-Calthorpe, 7th Baron Calthorpe, KCB JP (23 January 1831 – 16 November 1912), was a British soldier and politician. Calthorpe was the fourth son of Frederick Gough, 4th Baron Calthorpe and Lady Charlotte Somerset, daughter of the 6th Duke of Beaufort. He joined the 8th Hussars in 1849, rising to Brevet major by 1855. During the Crimean War he served as ADC to Lord Raglan. Lord Cardigan sued Calthorpe for his eyewitness account of the Charge of the Light Brigade in his memoir Letters from Headquarters, Or Realities of the War in the Crimea, but the action failed. He became lieutenant-colonel in 1861, commanding the 5th Dragoon Guards. He was the first chairman of the Isle of Wight County Council, and was a JP both there and in his native Midlands.