List of members of the Socialist Party of America explained
See also: List of elected socialist mayors in the United States.
This is a selectively annotated list of the most prominent or important members of the Socialist Party of America (1901–1972).
Summary list
Key:
* Went on to join the Communist Party, Communist Labor Party of America or Workers Party of America
ISS A founder or key member of the Intercollegiate Socialist Society, 1905, later League for Industrial Democracy
IWW A founder of the Industrial Workers of the World, 1905.
SDL Left to found the Social Democratic League of America, 1917.
SDF Left to found the Social Democratic Federation, 1936.
IPN Left to found the Independent Party of Norwalk, 1951
SDUSA Continued into Social Democrats, USA, 1973
SPUSA Went on to join the Socialist Party USA, 1973
DSOC Went on to join the Democratic Socialist Organizing Committee, 1973, later Democratic Socialists of America
Annotated list
Key:
* Went on to join the Communist Party, Communist Labor Party of America or Workers Party of America
ISS A founder or key member of the Intercollegiate Socialist Society, 1905, later League for Industrial Democracy
IWW A founder of the Industrial Workers of the World, 1905.
SDL Left to found the Social Democratic League of America, 1917.
SDF Left to found the Social Democratic Federation, 1936.
SDUSA Continued into Social Democrats, USA, 1973
SPUSA Went on to join the Socialist Party USA, 1973
DSOC Went on to join the Democratic Socialist Organizing Committee, 1973, later Democratic Socialists of America
- Martin Abern *
- Devere Allen
- Elmer Allison *
- E.B. "Harry" Ault
- J. Mahlon Barnes
- David P. Berenberg
- Victor L. Berger, Congressman from Milwaukee
- Barney Berlyn
- Allan L. Benson, 1916 candidate for Vice-President
- Ella Reeve Bloor *
- Roy E. Burt
- Frank Bohn IWW
- Earl Browder *, Communist Party leader and presidential candidate
- James P. Cannon *, leader of the Communist Party and Socialist Workers Party
- Jack Carney
- Travers Clement
- Joseph Coldwell
- James Connolly, Irish labor and nationalist leader
- Eugene V. Debs IWW, labor organizer, Presidential candidate
- David Dubinsky, labor leader
- Max Eastman *, writer
- J. Louis Engdahl
- William M. Feigenbaum, New York assemblyman 1918
- Elizabeth Gurley Flynn *, IWW and Communist leader
- William Z. Foster *, Communist leader and presidential candidate
- Louis Fraina *
- Joseph Freeman *
- Samuel Friedman, Vice-presidential candidate
- Charles B. Garfinkel, New York assemblyman 1918, temporary chairman of the NYC central committee SPA in 1935 after Old Guard was expelled
- Julius Gerber
- Adolph Germer
- Arturo Giovannitti
- Benjamin Gitlow *
- Carl Haessler *
- Emanuel Haldeman-Julius SDL
- Job Harriman, Vice-presidential candidate
- Michael Harrington DSOC, author
- Hubert Harrison
- Max S. Hayes, labor leader
- Bill Haywood IWW
- Emil Herman
- George D. Herron
- Morris Hillquit ISS, labor lawyer, New York mayoral candidate
- Daniel Hoan, mayor of Milwaukee
- Darlington Hoopes SPUSA
- Jessie Wallace Hughan ISS
- Henry Jager, NY assemblyman 1921
- Haim Kantorovitch
- William KarlinSDF, lawyer, NY assemblyman 1918
- Helen Keller
- Charles H. Kerr, publisher
- George R. Kirkpatrick
- Antoinette Konikow *
- Frederick Krafft
- Maynard C. Krueger
- William F. Kruse *
- Leo Krzycki, chairman
- Harry W. Laidler ISS
- Algernon Lee ISS, SDF
- Walter Lippman, journalist
- Jack London ISS
- Meyer London, Congressman from New York City
- George R. Lunn, mayor of Schenectady, New York
- Theresa S. Malkiel
- Mary Marcy
- James H. Maurer SDF
- Jasper McLevy SDF, mayor of Bridgeport, Connecticut
- David McReynolds SPUSA, peace advocate, SPUSA presidential candidate
- Herbert M. Merrill, secretary of the SPA-NY, first Socialist New York assemblyman (1912)
- Walter Thomas Mills
- Tom Mooney
- Thomas J. Morgan
- Gustavus Myers
- Scott Nearing
- Reinhold Niebuhr, theologian
- Santeri Nuorteva
- Kate Richards O'Hare
- James Oneal SDF
- Mary White Ovington, co-founder of the NAACP
- Joseph Arthur Padway
- Jacob Panken, New York municipal judge
- A. Philip Randolph SDF, SDUSA, labor and civil rights leader
- John Reed *, author
- Victor Reuther DSOC, labor organizer
- Walter Reuther, labor organizer
- Elmer Rosenberg, New York assemblyman 1918
- Charles Edward Russell, writer
- Bayard Rustin SDUSA, civil rights organizer
- Carl Sandburg, poet
- Margaret Sanger, advocate of family planning
- Roland D. Sawyer
- Edmund Seidel, New York state senator 1921–1922
- Clarence Senior
- Max Shachtman
- Abraham I. Shiplacoff, NY assemblyman 1916, 1917, 1918
- Upton Sinclair ISS, writer, organized End Poverty in California (EPIC)
- John W. Slayton
- John Spargo SDL, writer
- Seymour Stedman
- Charles P. Steinmetz, physicist
- A.M. Stirton, publisher of The Wage Slave, candidate for governor in Michigan in 1908
- J.G. Phelps Stokes ISS, SDL, social reformer
- Rose Pastor Stokes *, social reformer
- Maurice Sugar
- Norman Thomas, peace advocate, Presidential candidate
- Henry M. Tichenor
- Hermon F. Titus
- Gus Tyler, writer and labor leader
- Ernest Untermann
- Charles H. Vail
- Baruch Charney Vladeck
- Alfred Wagenknecht *
- Louis Waldman SDF
- Julius Wayland, publisher of The Appeal to Reason
- Joseph A. Whitehorn, lawyer, New York assemblyman 1917, 1918
- George W. Woodbey, preacher and African-American leader
- John M. Work
- Frank P. Zeidler SPUSA, mayor of Milwaukee, SPUSA presidential candidate
