| Official Name: | Bir Lahmar |
| Native Name: | (بئر الأحمر) |
| Settlement Type: | Commune and town |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: |  Tunisia |
| Subdivision Name1: | Tataouine Governorate |
| Unit Pref: | Imperial |
| Population As Of: | 2014 |
| Population Total: | 7955 |
| Utc Offset: | +1 |
Bir Lahmar is a town and commune in the Tataouine Governorate, Tunisia. As of 2004 it had a population of 8,418.[1] It is surrounded by the mountains of Djebel Dahar to the west and the coastal plain of Djeffara to the east.
As the name implies ("red well" in Arabic), the city developed around a source of water, a precious element in a desert region traditionally traveled by caravans.