Albert de Belleroche (1864 – 14 July 1944) was a Welsh painter and lithographer.
He was born in Swansea, but raised in Paris by his mother, Alice (originally from Brussels), and his stepfather, Harry Vane Millbank (his father, Edward Charles, the Marquis de Belleroche, having died whilst he was in infancy). In the 1930s he presented the National Museum of Wales with a small collection of his works, he also presented collections to the Bibliothèque Nationale, Paris, the Bibliothèque Royale, Brussels, and the British Museum in London. In 1915 he devised a method of detecting forged watermarks.
He died in July 1944 in Southwell.