CPN ledentallen (1909-1991)
| 
                           
 1909  | 
                        
                           
 419  | 
                     
| 
                           
 1910  | 
                        
                           
 500  | 
                     
| 
                           
 1911  | 
                        
                           
 515  | 
                     
| 
                           
 1912  | 
                        
                           
 511  | 
                     
| 
                           
 1913  | 
                        
                           
 533  | 
                     
| 
                           
 1914  | 
                        
                           
 523  | 
                     
| 
                           
 1915  | 
                        
                           
 528  | 
                     
| 
                           
 1916  | 
                        
                           
 557  | 
                     
| 
                           
 1917  | 
                        
                           
 713  | 
                     
| 
                           
 1918  | 
                        
                           
 1.089  | 
                     
| 
                           
 1919  | 
                        
                           
 1.799  | 
                     
| 
                           
 1920  | 
                        
                           
 2.431  | 
                     
| 
                           
 1921  | 
                        
                           
 2.025  | 
                     
| 
                           
 1922  | 
                        
                           
 1.904  | 
                     
| 
                           
 1923  | 
                        
                           
 1.488  | 
                     
| 
                           
 1924  | 
                        
                           
 1.568  | 
                     
| 
                           
 1925  | 
                        
                           
 1.562  | 
                     
| 
                           
 1926  | 
                        
                           
 1.500  | 
                     
| 
                           
 1927  | 
                        
                           
 1.200  | 
                     
| 
                           
 1928  | 
                        
                           
 1.400  | 
                     
| 
                           
 1929  | 
                        
                           
 1.146  | 
                     
| 
                           
 1930  | 
                        
                           
 1.100  | 
                     
| 
                           
 1931  | 
                        
                           
 1.580  | 
                     
| 
                           
 1932  | 
                        
                           
 3.693  | 
                     
| 
                           
 1933  | 
                        
                           
 6.155  | 
                     
| 
                           
 1934  | 
                        
                           
 5.780  | 
                     
| 
                           
 1935  | 
                        
                           
 5.840  | 
                     
| 
                           
 1936  | 
                        
                           
 6.200  | 
                     
| 
                           
 1937  | 
                        
                           
 10.123  | 
                     
| 
                           
 1938  | 
                        
                           
 10.382  | 
                     
| 
                           
 1939  | 
                        
                           
 10.595  | 
                     
| 
                           
 1940  | 
                        
                           
 9.000  | 
                     
| 
                           
 1941  | 
                        
                           
 2.000  | 
                     
| 
                           
 1942  | 
                        
                           
 (1.500)  | 
                     
| 
                           
 1943  | 
                        
                           
 
  | 
                     
| 
                           
 1944  | 
                        
                           
 
  | 
                     
| 
                           
 1945  | 
                        
                           
 
  | 
                     
| 
                           
 1946  | 
                        
                           
 50.000  | 
                     
| 
                           
 1947  | 
                        
                           
 53.000  | 
                     
| 
                           
 1948  | 
                        
                           
 53.000  | 
                     
| 
                           
 1949  | 
                        
                           
 34.000  | 
                     
| 
                           
 1950  | 
                        
                           
 27.392  | 
                     
| 
                           
 1951  | 
                        
                           
 
  | 
                     
| 
                           
 1952  | 
                        
                           
 
  | 
                     
| 
                           
 1953  | 
                        
                           
 (17.000)  | 
                     
| 
                           
 1954  | 
                        
                           
 
  | 
                     
| 
                           
 1955  | 
                        
                           
 15.463  | 
                     
| 
                           
 1956  | 
                        
                           
 
  | 
                     
| 
                           
 1957  | 
                        
                           
 12.858  | 
                     
| 
                           
 1958  | 
                        
                           
 12.317  | 
                     
| 
                           
 1959  | 
                        
                           
 11.262  | 
                     
| 
                           
 1960  | 
                        
                           
 
  | 
                     
| 
                           
 1961  | 
                        
                           
 
  | 
                     
| 
                           
 1962  | 
                        
                           
 
  | 
                     
| 
                           
 1963  | 
                        
                           
 
  | 
                     
| 
                           
 1964  | 
                        
                           
 
  | 
                     
| 
                           
 1965  | 
                        
                           
 
  | 
                     
| 
                           
 1966  | 
                        
                           
 
  | 
                     
| 
                           
 1967  | 
                        
                           
 (11.000)  | 
                     
| 
                           
 1968  | 
                        
                           
 
  | 
                     
| 
                           
 1969  | 
                        
                           
 
  | 
                     
| 
                           
 1970  | 
                        
                           
 
  | 
                     
| 
                           
 1971  | 
                        
                           
 
  | 
                     
| 
                           
 1972  | 
                        
                           
 
  | 
                     
| 
                           
 1973  | 
                        
                           
 10.147  | 
                     
| 
                           
 1974  | 
                        
                           
 
  | 
                     
| 
                           
 1975  | 
                        
                           
 
  | 
                     
| 
                           
 1976  | 
                        
                           
 11.550  | 
                     
| 
                           
 1977  | 
                        
                           
 13.082  | 
                     
| 
                           
 1978  | 
                        
                           
 15.298  | 
                     
| 
                           
 1979  | 
                        
                           
 15.520  | 
                     
| 
                           
 1980  | 
                        
                           
 15.510  | 
                     
| 
                           
 1981  | 
                        
                           
 15.014  | 
                     
| 
                           
 1982  | 
                        
                           
 14.370  | 
                     
| 
                           
 1983  | 
                        
                           
 13.868  | 
                     
| 
                           
 1984  | 
                        
                           
 11.594  | 
                     
| 
                           
 1985  | 
                        
                           
 7.768  | 
                     
| 
                           
 1986  | 
                        
                           
 6.380  | 
                     
| 
                           
 1987  | 
                        
                           
 6.500  | 
                     
| 
                           
 1988  | 
                        
                           
 6.500  | 
                     
| 
                           
 1989  | 
                        
                           
 5.700  | 
                     
| 
                           
 1990  | 
                        
                           
 
  | 
                     
| 
                           
 1991  | 
                        
                           
 3.416  | 
                     
De ledentallen zijn ontleend aan G. Voerman en J. Wormer, ‘De CPN in cijfers, 1909-1991’, in: M. Schrevel en G. Voerman, red., De communistische erfenis. Bibliografie en bronnen betreffende de CPN, Amsterdam, 1997, 164-165.
Van 1909 tot en met 1917 is het ledental van de Sociaal-Democratische Partij weergegeven.