The Itigi-Sumbu thicket is an ecoregion consisting of two small areas of thick shrubland in Tanzania, Zambia and the adjacent Democratic Republic of the Congo, in East Africa.

The distinctive nature of this small region is partly due to its setting on dry alluvial soil over a hard duricrust, while the surrounding areas are rocky hills and plateaus.

[1] The extremely dense, impenetrable Itigi deciduous thicket is a unique mixture of over 100 species of woody shrubs 3 to 5 metres (9.8 to 16.4 ft) high.

The thickets are also home to three endemic reptiles – the Urungu beaked snake (Rhinotyphlops gracilis), four-fingered skink (Sepsina tetradactyla), and Johnston's long-tailed lizard (Latastia johnstonii).

The thickets are being extensively cleared for firewood and for cultivation as the populations of the two countries grow, with 50% gone in Tanzania (which is unprotected) and 70% in Zambia, which does have some protection in the Mweru Wantipa National Park.