Blech may refer to:
People Benjamin Blech, American orthodox rabbi David Blech (born 1955), American businessman Gustavus M. Blech (1870–1949), American physician Hans Christian Blech (1915–1993), German actor Jörg Blech (born 1966), German journalist and author Leo Blech (1871–1958), German opera composer and conductor
Other Blech, a metal sheet used by Jews to cover stovetop burners Brass instruments (Blech in German) Blech, a synchronous programming language Blex