Colonel Henry Wemyss Feilden, CB (6 October 1838 – 8 June 1921) was a British Army officer, Arctic explorer and naturalist.
Feilden was the second son of Sir William Henry Feilden (1812−1879), 2nd Baronet of Feniscowles. Feilden was born at Newbridge Barracks in Kildare where his father was then serving in the 17th Lancers. He was educated at Cheltenham College. After joining the Black Watch, at the age of nineteen, he fought in the suppression of the Indian Mutiny 1857-58 and at the Taku Forts in China in 1860. He also volunteered on the side of the Confederate Army during the American Civil War of 1862−1865, serving as assistant adjutant-general, and surrendering after the last battle of the war, with the remnant of the Army of Tennessee under General J. E. Johnston to General Sherman.
He then returned to the British Army, where he made captain in the Royal Artillery in 1874. He served in the First Boer War in 1881 and again in Africa in 1890. After the outbreak of the Second Boer War, he was again appointed Paymaster of Imperial Yeomanry on 3 February 1900. He was decorated for his service in India, China and South Africa, and was appointed a Companion of the Order of the Bath (CB) for his services to Imperial Yeomanry in 1900.
Feilden also collected information on the geology, flora and fauna of newly explored areas, and served as naturalist on Sir George Nares' Northern Polar Expedition in 1875 on board Alert. During his service in Pegu, he contributed notes on the birds of the region to Allan Octavian Hume. He was a fast friend of the famous writer and poet Rudyard Kipling. The surgeon on the HMS Alert, Dr Edward L. Moss, held a low opinion of Feilden's scientific expertise.