Marion Mahony Griffin (February 14, 1871 – August 10, 1961) was an American architect and artist.
She was one of the first licensed female architects in the world, and is considered an original member of the Prairie School.
Her work in the United States developed and expanded the American Prairie School.
Her work in India and Australia reflected Prairie School ideals of indigenous landscape and materials in the newly formed democracies.
The scholar Deborah Wood has stated that Griffin "did the drawings people think when they think Frank Lloyd Wright (one of her collaborating architects)." During her career, she produced some of the best architectural drawing in America and was instrumental in envisioning the design plans for then new capital city of Australia, Canberra.