| Official Name: | Ad Casub |
| Native Name: | أد كاسب |
| Pushpin Map: | Eritrea |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Eritrea |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name: | Eritrea |
| Subdivision Name1: | Gash-Barka |
| Subdivision Type2: | District |
| Subdivision Name2: | Gogne District |
| Coordinates: | 15.4°N 54°W |
| Elevation M: | 716 |
Ad Casub (Arabic: أد كاسب) is a village in western Eritrea. It is located in Gogne District in the Gash-Barka region.
Nearby towns and villages include Algheden (10.4nmi), Adal (8.4nmi), Kieru (11.2nmi), Markaughe (5.7nmi), Hambok (10.6nmi) and Antalla (8.9nmi).