Charles Lahr (27 July 1885 – 1971), born Carl Lahr, was a German-born anarchist, London bookseller and publisher. Lahr was born at Bad Nauheim in the Rhineland, the eldest of 15 children in a farming family. He left Germany in 1905 to avoid military service and went to London, England where he lived until his death in 1971. In London he encountered the anarchist Guy Aldred (1886–1963), while working as a baker. He was soon (1907) under police observation. He joined the Industrial Workers of the World in 1914; at that time he had a bookshop in Hammersmith.