Henry Brereton Marriott Watson (20 December 1863 – 30 October 1921), known by his pen name H. B. Marriott Watson, was an Australian-born British novelist, journalist, playwright, and short-story writer. He worked for the St. James Gazette, was assistant editor of the Black and White and Pall Mall Gazette, and staff member on W. E. Henley's National Observer.