Adolf H. A. Weidig (b. 28 November 1867 Hamburg, Germany; d. 23 September 1931) was an American composer who was born and raised in Hamburg. After extensive musical studies in Europe, including at the Academy of Music, Munich, he immigrated to the United States in 1892 as a young man. He wrote numerous pieces for orchestra, including a symphony and the tone poem Semiramis; among his chamber works are three string quartets and a string quintet. He also wrote songs. He died in Hinsdale, Illinois.