Oueslatia is a town and commune in the Kairouan Governorate, Tunisia.

It is at the center of a plain between the mountainous alignments of Djebel Ousselat and Djebel Serj belonging to the southern flank of the Tunisian ridge.

In addition to the city, the villages of Maarouf, El Menzel, Djebel Serj, Zaghdoud, Djebel Ousselat, Djebel Erreihane, Ain Djeloula, Oum El Ksal and El Behaïer are attached to it.

There are caves with cave paintings of which the best preserved represent scenes of hunting rhinoceros, ostriches and buffalos.

Thirty kilometers from Oueslatia is the ancient site of Ksar Lemsa where the remains of a fortress of the Byzantine period and a Roman theater are preserved.