Lemseid or Lamssid (Arabic: لمسيد, Spanish: Lemsid) is a small town near El-Aaiun in the Saguia el-Hamra part of Western Sahara, close to the Saguia el-Hamra (Red River) itself.

The Sahrawi independence activist and leader of the Harakat Tahrir, Muhammad Bassiri, grew up here in the 1950s.

[1] They protest for the discrimination of Sahrawis in labor and for the spoliation of the natural resources of Western Sahara.

They were surrounded by Moroccan Army and police, who made a blockage of water, food and medicines to the camp.

Lamssid has a hot desert climate (Köppen classification BWh).