Hitchings was born in Hoquiam, Washington, in 1905, and grew up there, in Berkeley, California, San Diego, Bellingham, Washington, and Seattle. He graduated from Seattle's Franklin High School, where he was salutatorian, in 1923, and from there went to the University of Washington, from which he graduated with a degree in chemistry cum laude in 1927, after having been elected to Phi Beta Kappa as a junior the year before. That summer, he worked at the university's Puget Sound Biological Station at Friday Harbor on San Juan Island [1], and received a master's degree the next year for his thesis based on that work.