Elections to the First All-Russian Congress of Soviets

16 June 1917 – 7 July 1917
  Majority party Minority party Third party
 
Leader Viktor Chernov Julius Martov Vladimir Lenin
Party Socialist-Revolutionaries Mensheviks Bolsheviks
Alliance Moderate Socialists Moderate Socialists Radical Socialists
Seats won 285 248 105
Percentage 26.15% 22.75% 9.63%

  Fourth party Fifth party Sixth party
 
Leader Not Applicable Julius Martov Leon Trotsky
Party Non-factional Socialists Menshevik-Internationalists Mezhraiontsy
Alliance Moderate Socialists Radical Socialists
Seats won 73 32 10
Percentage 6.70% 2.94% 0.92%

Other Parties and Factions
  General Jewish Labour Bund – 10 seats (0.92%)
  Trudoviks – 5 seats (0.46%)
  Yedinstvo – 3 seats (0.28%)
  Popular-Socialists – 3 seats (0.28%)
  Pro-Bolshevik SRs – 2 seats (0.18%)
  Anarchists – 1 seat (0.09%)
  Non-partisans – 333 seats (28.71%)

Elected Chairman of the All-Russian Central Executive Committee

Nikolay Chkheidze
Mensheviks