Guemar (Arabic: ﻗﻤﺎر) is a Saharan oasis town in Algeria near the Tunisian border, in the Oued Souf area of the El Oued Province, about 20 km north of El Oued.

[citation needed] According to the 2008 census it has a population of 39,168,[1] up from 29,185 in 1998,[2] with an annual growth rate of 3.0%.

[1] Guemar has a hot desert climate (Köppen climate classification BWh), with very hot summers and mild winters.

Rainfall is light and sporadic, and summers are particularly dry.

Guemar lies on the N48 highway from El Oued to Still and then Biskra via the N3.