Julia Morgan (January 20, 1872 – February 2, 1957) was an American architect and engineer. She designed more than 700 buildings in California during a long and prolific career. She is best known for her work on Hearst Castle in San Simeon, California.
Morgan was the first woman to be admitted to the architecture program at l'École nationale supérieure des Beaux-Arts in Paris and the first female architect licensed in California. She designed many edifices for institutions serving women and girls, including a number of buildings for the Young Women's Christian Association (YWCA) and Mills College.
In many of her structures, Morgan pioneered the aesthetic use of reinforced concrete, a material that proved to have superior seismic performance in the 1906 and 1989 earthquakes.