Stefan Aleksander Okrzeja (Polish pronunciation: [ˈstɛfan alɛˈksandɛr ɔˈkʂɛja]; born 3 April 1886 in Dębe Wielkie, Mińsk County, executed 21 July 1905 in Warsaw) was a Polish worker, socialist and activist for Poland's independence.

Badly wounded and unable to escape, he was arrested and imprisoned in the infamous 10th Pavilion of Warsaw Citadel.

According to the fact he was caught red-handed, the trial before a district court was very short, despite the passionate defence by Stanisław Patek.

By his deeds and martyrdom, Stefan Okrzeja became a hero of Polish Socialist Party and an icon of its fight for independent Poland and workers rights.

His name was given to the 28th Infantry Division and the 3rd Battalion of the Military Units of the Uprising Emergency of Socialists, as well as to a street on Praga, not far away from the place of his last combat action.