Henry Augustus Muhlenberg III (1848–1906) was a prominent citizen of Reading, Pennsylvania and an unsuccessful candidate for the United States Congress with the Republican nomination in 1892. Muhlenberg was born in Reading. He was the son of Henry Augustus Muhlenberg (1823–1854) and Annie H. Muhlenberg Muhlenberg, who was a cousin of Henry Augustus on her father's side. In 1892 Muhlenberg was nominated for Congress on the Republican ticket, but lost in the general election.