| Official Name: | Souk Lahad |
| Settlement Type: | Commune and town |
| Pushpin Map: | Tunisia |
| Pushpin Map Caption: | Location in Tunisia |
| Subdivision Type: | Country |
| Subdivision Name: |  Tunisia |
| Subdivision Name1: | Kébili Governorate |
| Leader Title: | Mayor |
| Leader Name: | Ridha Maghzaoui (People’s Movement) |
| Unit Pref: | Metric |
| Population As Of: | 2014 |
| Population Total: | 18983 |
| Utc Offset: | +1 |
| Coordinates: | 33.788°N 8.793°W |
Souk Lahad (Arabic: سوق الأحد ) is an oasis town and commune in the Kébili Governorate, Tunisia, about 15 kilometers northwest of the town of Kébili.
It is located in the Nefzaoua region on the road from Kébili to Tozeur, just east of the point where the road begins its traversal of the Chott el-Jerid. It is the administrative seat of a delegation of the same name.
As of 2004 Soul Lahad had a population of 18,285.[1]
As suggested by its name—sūq al-aḥad means "Sunday market" in Arabic[2] —the town developed as an agricultural community before light industry was introduced, as well as some tourism, with a luxury hotel.