William Reagan Gorham (??? ??, Gohamu Katsundo, 4 January 1888 – 24 October 1949) was an American automobile engineer who emigrated to Japan.
Gorham would make substantial contributions to the technology and capability of Japan's fledgling automobile industry, and worked with a number of companies that would eventually be merged into the Nissan Motor Company by Yoshisuke Aikawa, who would become a close friend and business partner to Gorham.
In David Halberstam's 1986 book The Reckoning, Halberstam states: "In terms of technology, Gorham was the founder of the Nissan Motor Company" and that "In 1983, sixty-five years after [Gorham's] arrival...
young Nissan engineers who had never met him spoke of him as a god and could describe in detail his years at the company and his many inventions."