Luis Jorge Fontana (born April 19, 1846 in Buenos Aires, Argentina; died October 18, 1920 in San Juan, Argentina) was an Argentine military officer, explorer, geographer, writer, and politician. He was the first governor of the national territory of Chubut (now Chubut Province) and founder of the city of Formosa. Fontana spent his later years in San Juan, where he held various public and community offices. He died on October 18, 1920.