Johan Peter Weisse (13 August 1832 – 7 March 1886) was a Norwegian philologist.
He was born in Fluberg as a son of physician Joachim Frederik Weisse and his wife Grethe Fleischer.
He read languages such as Norse, Anglo-Saxon, Gothic, Old Danish, Old Swedish, Greek, Latin, Russian and Cuneiform script already at that time, as witnessed by his diary Litterær Dagbog.
He was a part of a Nordic intellectual group here, which included Julius Middelthun, Christoffer Borch, Georg Forchhammer and Niels Ravnkilde.
He is remembered for writing political and satirical commentary, and a 25-piece series between July 1859 and January 1860 on Italian history and society, marking himself as a supporter of Camillo Cavour.
His obituary in Dagbladet read that Weisse wanted to "form men and not mere objects for examination".