Doris Mackinnon (30 September 1883 – 10 September 1956) was a British zoologist. Born in Scotland, her father was a Consular Agent and her mother managed a "women's home". Influenced by Maria Gordon, Mackinnon studied botany and geology at Aberdeen University, graduating in 1906. She received the "Carnegie scholarship", studying abroad for two years before returning to Scotland. She achieved her doctorate from Aberdeen University in 1914, becoming a lecturer at University College, Dundee (the forerunner of the University of Dundee, but then a part of the University of St Andrews) in 1916.