| Lake Katam | |
| Location: | Sahara Chad |
| Outflow: | subsurface |
| Inflow: | subsurface; evaporation |
| Basin Countries: | Chad |
| Length: | 2.4km (01.5miles) |
| Width: | 1km (01miles) |
| Elevation: | 377m (1,237feet) |
| Pushpin Map: | Chad#Africa |
| Pushpin Map Alt: | Location of Lake Katam in Chad. |
The Lake Katam is one of the larger lakes in Ounianga Kebir, a lake system in the Borkou-Ennedi-Tibesti Region in the north-east basin of Chad. These lakes are notable for their running in the north–south headlands, by the Trade wind are formed. They are the remnant of a much larger lake, that filled the basin during the so-called green Sahara-time, which lasted from about BC 10000–1500.