Peter Dinwiddie Wigginton (September 6, 1839 – July 7, 1890) was an American lawyer and politician who served as a U.S. representative from California during the 1870s.

Born in Springfield, Illinois, Wigginton moved to Wisconsin with his parents in 1843.

He studied law and was admitted to the bar in 1859 and started his practice.

After apparently losing re-election in 1876 to Romualdo Pacheco, Wigginton successfully contested Pacheco's election to the 45th Congress and was seated in his place, serving out the term (February 7, 1878 – March 4, 1879).

This article incorporates public domain material from the Biographical Directory of the United States Congress