Wilhelm Georg Rapp (1827–1907) was a Jewish German American journalist, abolitionist, and newspaper editor.

[1] As a student at University of Tübingen Rapp participated in the German revolution of 1848, and was imprisoned for a year for his activities.

Upon his release Rapp lived in Switzerland, where he taught school before emigrating to the United States in 1852.

Rapp's anti-secessionist and anti-slavery views made him the target of mob violence, and in 1861 he narrowly escaped lynching by fleeing to Washington D.C. disguised as a minister.

He and his wife Gesine had three daughters: Emilie, Frida, and Mathilda, and a son, William Jr.