The Northeastern Congolian lowland forests (French: Forêts de plaine du nord-est du Congo) is a tropical moist broadleaf forest ecoregion that spans the Democratic Republic of the Congo and the Central African Republic.

It is the easternmost portion of the Guineo-Congolian region, a belt of tropical rain forests that extends through western and central Africa.

[6] 16 mammals are endemic to the ecoregion, including the okapi (Okapia johnstoni), giant genet (Genetta victoriae), aquatic genet (Genetta piscivora), lesser forest shrew (Sylvisorex oriundus), African foggy shrew (Crocidura caliginea), fuscous shrew (Crocidura polia), owl-faced monkey (Cercopithecus hamlyni), and L'Hoest's monkey (Allochrocebus lhoesti).

[6] Endemic birds include Neumann's coucal (Centropus neumanni) and golden-naped weaver (Ploceus aureonucha).

Nahan's francolin (Ptilopachus nahani), Ituri batis (Batis ituriensis), Turner's eremomela (Eremomela turneri), Congo peacock (Afropavo congensis), Sassi's greenbul (Phyllastrephus lorenzi), Bedford's paradise-flycatcher (Terpsiphone bedfordi), and Chapin's mountain-babbler (Turdoides chapini) are considered near-endemic.