# List of members of the Socialist Party of America

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
* Martin Abern *
* Devere Allen
* Elmer Allison *
* Harry Ault
* J. Mahlon Barnes
* David P. Berenberg
* Victor L. Berger
* Barney Berlyn
* Allan L. Benson
* Ella Reeve Bloor *
* Nikolai Bukharin
* Roy E. Burt
* Frank Bohn $^{IWW}$
* Earl Browder*
* Jack Carney *
* James P. Cannon *
* John C. Chase
* Travers Clement
* Joseph Coldwell
* James Connolly
* Eugene V. Debs $^{IWW}$
* Nicholas Dozenberg *
* David Dubinsky
* Max Eastman *
* J. Louis Engdahl
* Elizabeth Gurley Flynn *
* William Z. Foster *
* Louis Fraina *
* Joseph Freeman *
* Irving Freese $^{IPN}$
* Samuel Friedman $^{SPUSA}$
* Julius Gerber
* Adolph Germer
* Arturo Giovannitti
* Benjamin Gitlow *
* Carl Haessler *
* Emanuel Haldeman-Julius $^{SDL}$
* Job Harriman
* Michael Harrington $^{DSOC}$
* Hubert Harrison
* Max S. Hayes
* Bill Haywood $^{IWW}$
* Emil Herman
* George D. Herron
* Morris Hillquit $^{ISS}$
* Daniel Hoan
* Darlington Hoopes $^{SPUSA}$
* Jessie Wallace Hughan $^{ISS}$
* Haim Kantorovitch
* David Karsner
* Helen Keller
* Charles H. Kerr
* George R. Kirkpatrick
* Alexandra Kollontai
* Antoinette Konikow *
* Frederick Krafft
* Maynard C. Krueger
* William F. Kruse *
* Leo Krzycki
* Harry W. Laidler $^{ISS}$
* Algernon Lee $^{ISS,SDF}$
* Lena Morrow Lewis $^{SDF}$
* Walter Lippman
* Jack London $^{ISS}$
* George Lunn
* Theresa S. Malkiel
* Mary Marcy
* James H. Maurer $^{SDF}$
* Jasper McLevy $^{SDF}$
* David McReynolds $^{SPUSA}$
* Walter Thomas Mills
* Tom Mooney
* Thomas J. Morgan
* Gustavus Myers
* Scott Nearing
* Reinhold Niebuhr
* Santeri Nuorteva
* Kate Richards O'Hare
* James Oneal $^{SDF}$
* Mary White Ovington
* Joseph Arthur Padway
* Jacob Panken
* Patrick L. Quinlan
* A. Philip Randolph $^{SDF,SDUSA}$
* John Reed *
* Victor Reuther $^{DSOC}$
* Walter Reuther
* Charles Edward Russell
* Bayard Rustin $^{SDUSA}$
* Carl Sandburg
* Margaret Sanger
* Roland D. Sawyer
* Clarence Senior
* Max Shachtman
* Abraham Shiplacoff
* Upton Sinclair $^{ISS}$
* John W. Slayton
* John Spargo $^{SDL}$
* Seymour Stedman
* Charles P. Steinmetz
* A.M. Stirton
* J.G. Phelps Stokes $^{ISS,SDL}$
* Rose Pastor Stokes *
* Maurice Sugar
* Norman Thomas
* Henry M. Tichenor
* Hermon F. Titus
* Gus Tyler
* Ernest Untermann
* Charles H. Vail
* Baruch Charney Vladeck
* Alfred Wagenknecht *
* Louis Waldman $^{SDF}$
* Julius Wayland
* George W. Woodbey
* John M. Work
* Frank P. Zeidler $^{SPUSA}$

## 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 Karlin$^{SDF}$, 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