Zygmunt Witalis Zaremba (born 1895, Piotrków, Poland – died 5 October 1967, Sceaux, France), pseudonyms Andrzej Czarski (Czerski), Wit Smrek, was a Polish socialist activist and publicist.

Zaremba was a member of the Youth Association for Progress and Independence (Związek Młodzieży Postępowo-Niepodległościowej; 1911), Polish Socialist Party - Opposition (Polska Partia Socjalistyczna - Opozycja; 1912–1914), then was a member of the Polish Socialist Party (Polska Partia Socjalistyczna) and its Central Executive Committee (Centralny Komitet Wykonawczy; 1917–1918).

Then, he became a member of Polish Socialist Party authorities – Supreme Council (Rada Naczelna; 1919–1939) and Central Executive Committee (1921–1924, 1926–1939).

[clarification needed] Zaremba was a co-founder of conspiratory Polish Socialist Party - Freedom-Equality-Independence (PPS - Wolność-Równość-Niepodległość).

In 1946, he moved to Paris, where he became a president of the Central Committee (Rada Centralna) of the Polish Socialist Party.