John Francis Campion (December 1849 – July 17, 1916) was a wealthy Canadian-American who made his fortune in mining and sugar production. He was also an executive and investor in banking, railroad, insurance, and other businesses. He was a co-founder of what is now called the Denver Museum of Nature and Science and was president of the board of trustees until his death in 1916. He donated his rare collection of native gold, which is among the best in the world.