John Alexander Somerville, D.D.S. (1882 – February 11, 1972) was an African American Civil rights activist, dentist, and entrepreneur. A well-known community figure in Los Angeles, Somerville was an accomplished dentist who went on to co-found the Los Angeles branch of the National Association for the Advancement of Colored People. He is most well known for building Hotel Somerville, now known as Dunbar Hotel.