Courtmartialed [as Clarke Fitch] (juvenile novel) 1898

Springtime and Harvest: A Romance (novel) 1901; also published as King Midas: A Romance, 1901

The Journal of Arthur Stirling (novel) 1903

Prince Hagen (novel) 1903

Manassas: A Novel of the War (novel) 1904; revised edition published as Theirs Be the Guilt: A Novel of the War between the States, 1959

A Captain of Industry, Being the Story of a Civilized Man (novel) 1906

The Jungle (novel) 1906

The Industrial Republic: A Study of the America of Ten Years Hence (nonfiction) 1908

The Metropolis (novel) 1908

The Moneychangers (novel) 1908

Love's Pilgrimage (novel) 1911

Sylvia (novel) 1913

King Coal (novel) 1917

The Brass Check: A Study of American Journalism (nonfiction) 1920

The Goose-Step: A Study of American Education (nonfiction) 1923

The Goslings: A Study of American Schools (nonfiction) 1924

Boston: A Documentary Novel of the Sacco-Vanzetti Case. 2 vols. (novel) 1928

Roman Holiday (novel) 1931

American Outpost: A Book of Reminiscences (memoirs) 1932

Co-op: A Novel of Living Together (novel) 1936

The Flivver King: A Story of Ford-America (nonfiction) 1937

Our Lady (novel) 1938

Dragon's Teeth (novel) 1942

Dragon Harvest (novel) 1945

One Clear Call (novel) 1948

What Didymus Did (Whether You Believe It or Not) (novel) 1954; also published as It Happened to Didymus, 1958

My Lifetime in Letters (letters) 1960

The Autobiography of Upton Sinclair (autobiography) 1962

The Coal War: A Sequel to King Coal (novel) 1976

The Lost First Edition of Upton Sinclair's The Jungle [edited by Gene DeGruson] (novel) 1988