Charles Nathaniel Haskell (March 13, 1860 – July 5, 1933) was an American lawyer, oilman, and politician who was the first governor of Oklahoma. As a delegate to Oklahoma's constitutional convention, he played a crucial role in drafting the Oklahoma Constitution and gaining Oklahoma's admission into the United States as the 46th state in 1907. A prominent businessman in Muskogee, Oklahoma, he helped the city to grow in importance.