亚瑟·兰塞姆（Arthur Ransome，1884年1月18日－1967年6月3日），英国儿童文学作家。最著名的作品为《燕子与鹦鹉》（Swallows and Amazons）系列小说。

Arthur Michell Ransome (18 January 1884 – 3 June 1967) was an English author and journalist. He is best known for writing the Swallows and Amazons series of children's books about the school-holiday adventures of children, mostly in the Lake District and the Norfolk Broads. Many of the books involve sailing; fishing and camping are other common subjects. The books remain popular and "Swallows and Amazons" is the basis for a tourist industry around Windermere and Coniston Water, the two lakes Ransome adapted as his fictional North Country lake.