Communist Party of Belgium was created in 1921.
Spanish Communist Party ended in 1921.
Communist Party of the Netherlands ended in 1991.
Communist Party of Poland ended in 1938.
Catalan Communist Party ended in 1930.
Romanian Communist Party ended in 1989.
Communist Party of Moldova ended in 1991.
Communist Party of Turkmenistan ended in 1991.
Communist Party of Khorezm ended in 1924.
Communist Party of Byelorussia ended in 1991.
Communist Party of Uzbekistan ended in 1991.
Communist Party of Latvia ended in 1991.