Zygmunt Stanisław Marek (born March 17, 1872 in Kraków, died 1931 in Kraków) was a Polish socialist politician. After graduating from gymnasium he studied law. He joined the Polish Social Democratic Party of Galicia (PPSD) in 1890. Marek was a chief editor of the newspaper ‘'Więzien polityczny (Political prisoner) and Naprzód (Forward) during World War I. In 1919, after Poland regained independence after years of partitions, he joined the united Polish Socialist Party (PPS).