Ludwig Renn (April 22, 1889 – July 21, 1979) was a German writer.
Born Arnold Friedrich Vieth von Golßenau in Dresden into a Saxon noble family, he fought in World War I on the Western Front. He wrote the book Krieg on his experiences. He was also a member of the KPD, the Communist Party of Germany, joining in 1928. In 1933, he was one of a great many prominent German communists falsely alleged by the Communist Party to have been murdered by the Nazis.