List of members of the Socialist Party of America

Summary list

• 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

• 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
• 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
• 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 ^ISSSDL, 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