Emily Eolian Williams (September 25, 1869 - June 3, 1942) was a pioneering woman in architecture who was active in Pacific Grove, San Jose and San Francisco in the early 20th century, at a time, when very few women were able to enter the profession. She mainly designed houses, with conveniently planned interiors, and a few institutional buildings and an exhibition stand at the Panama-Pacific International Exposition in San Francisco.