Officials laid wreaths and the group said prayers at the monument to the Ghetto Heroes on Saturday.
Next, they walked to the former Umschlag Platz, where in 1943 Nazis had loaded ghetto residents on cattle wagons to take them to the Treblinka camp.
About half a million Warsaw's Jews died there.
When it was clear that all residents were to be sent to death, some 750 untrained and poorly armed Jews in desperation put up resistance on April 19, 1943. Within weeks, the Nazis crushed the revolt, most fighters were killed and the ghetto was razed.