William Anthony Richardson was an early California entrepreneur, influential in the development of Yerba Buena, the forerunner of the city of San Francisco.

Yerba Buena was the original name of the settlement that later became San Francisco. Located near the northeastern end of the San Francisco Peninsula, between the Presidio of San Francisco and the Mission San Francisco de Asís, it was originally intended as a trading post for ships visiting San Francisco Bay. The settlement was arranged in the Spanish style around a plaza that remains as the present day Portsmouth Square.