Philip Reinagle RA (1749 – 27 November 1833) was an English animal, landscape and botanical painter. The son of an Hungarian musician living in Edinburgh, Reinagle came to London in 1763 and after serving an apprenticeship, later became a member of the Royal Academy.
Philip Reinagle entered the schools of the Royal Academy in 1769, and later became a pupil of Allan Ramsay, whom he assisted on his numerous portraits of George III and Queen Charlotte.
He first exhibited at the Royal Academy in 1773, The works he showed were almost all portraits until 1785, when the monotonous work of producing replicas of royal portraits appears to have given him a distaste for portraiture, and led him to abandon it for animal painting. He became very successful in his treatment of sporting dogs, especially spaniels, of birds, and of dead game. In 1787, however, he showed a View taken from Brackendale Hill, Norfolk, at the academy and from then on exhibited works mostly landscapes. He was elected an associate of the Royal Academy in 1787, but did not become an academician until 1812, when he presented as his diploma picture An Eagle and a Vulture disputing with a Hyaena. He also exhibited frequently at the British Institution.
Reinagle was also an accomplished copyist of the Dutch masters, and his reproductions of cattle-pieces and landscapes by Paul Potter, Ruisdael, Hobbema, Berchem, Wouwerman, Adriaen van de Velde, Karel Dujardin, and others have often been passed off as originals. He also made some of the drawings for Robert John Thornton's New Illustration of the Sexual System of Linnaeus (1799–1807), and for his Philosophy of Botany (1809–10) ; but his best drawings for book illustration were those of dogs for William Taplin's Sportsman's Cabinet (1803) which were engraved by John Scott.