Guelta Zemmur (or Guelta Zemour, Tamazight for "olive tree pool") is a small town or village in the Moroccan-administered territory of Western Sahara. The town is based around a guelta or oasis, retaining rain water for long periods. It was a camp site for the Sahrawi nomads of the area for hundreds of years. The town is the birthplace of Sahrawi human rights defender Mohammed Daddach, who is Morocco's longest serving political prisoner.