Petr Wolfgang Wygodzinsky (5 October 1916, in Bonn – 27 January 1987, in Middletown, New York) was a German entomologist who worked in Argentina, Brazil, and the United States.
(Alternate spellings of his name include Peter Wygodzinsky and Pedro Wygodzinsky.) He studied several groups of insects in detail, but is known, especially, for his work on the hemipteran family Reduviidae.
He worked at the American Museum of Natural History as an assistant curator (later curator) from 1962 until the end of his career.