Robert William Chambers (May 26, 1865 – December 16, 1933) was an American artist and fiction writer, best known for his book of short stories titled The King in Yellow, published in 1895.

Chambers was first educated at the Brooklyn Polytechnic Institute, and then entered the Art Students' League at around the age of twenty, where the artist Charles Dana Gibson was his fellow student. Chambers studied at the École des Beaux-Arts, and at Académie Julian, in Paris from 1886 to 1893, and his work was displayed at the Salon as early as 1889. On his return to New York, he succeeded in selling his illustrations to Life, Truth, and Vogue magazines. Then, for reasons unclear, he devoted his time to writing, producing his first novel, In the Quarter (written in 1887 in Munich).