Horace Pauleus Sannon (7 April 1870[1] – 27 August 1938) was a Haitian historian, politician and diplomat.

Born in Les Cayes,[1] Pauleus Sannon began medical studies at the Sorbonne in Paris, France, but abandoned them to study social-political sciences at the Collège de France.

[1][2] While still in France, he published his first book, Haiti et le régime parlementaire.

[2] He was a co-founder, and the first president, of Haiti's Société d'Histoire et de Geographie, a group of Haitian intellectuals formed in 1924 who saw studying the past as a means to generate national pride and understand the conditions of the present (at the time, Haiti was occupied by United States Marines).

[2] He served as Haiti's Minister of Foreign Affairs in 1906, and negotiated a trade treaty with France.