Friedrich Weber (3 August 1781 – 21 March 1823) was a German entomologist. He was a pupil of Johan Christian Fabricius (1745–1808), and wrote Nomenclator entomologicus in 1795 at the age of 14 and Observationes entomologicae in 1801. These two works contained the first descriptions of many new insect species and also first descriptions of other invertebrates like the lobster genus Homarus.