Sofia Sigizmundovna Dzerzhinskaya (born Muszkat; Polish: Zofia Dzierzynska—Muszkat; Russian: ????? ????????????? ???????????—??????; 4 December 1882 – 27 February 1968) was a leading Polish Social Democrat and later Communist politician, and spouse of Felix Dzerzhinsky.
She was born in Warsaw, Poland, to a Jewish family.
She married Felix Dzerzhinsky on 10 November 1910 in Kraków at the St Nicholas Church.
On 23 June 1911 she gave birth to their first son and only child Jan in Pawiak prison.
From September 1918 through February 1919 Sofia was a member of the Soviet diplomatic mission in Bern.
From 1920 she lived in the Soviet Union, in Moscow where she worked as a teacher.
In 1922 Sofia worked in the School of Rosa Luxemburg in Moscow, later, 1923-24 at the Communist University of the National Minorities of the West.
After that worked in the Polish Bureau of the Communist Party of the Soviet Union.
In 1939-43 Sofia worked at the Executive Committee of Comintern.
In 1969, her memoirs "Lata wielkich bojów: wspomnienia" were published in Poland by Ksiazka i Wiedza publishing house.