The Northeast China Plain deciduous forests ecoregion (WWF ID: PA0430) covers the flat interior Northeast China Plain and neighboring adjacent northwestern North Korea, in the region historically known as Manchuria.

The plain is surrounded by mountains on the north and east, and supports some of China's largest forest tracts.

The southern half of the region is the watershed of the Liao River, which runs south into the Bohai Sea.

Farther north, forests are characterized by Mongolian oak (Quercus mongolica) and Daurian birch (Betula dahurica).

Throughout, the plain is heavily converted to agriculture, taking advantage of the climate and the fertile chernozem soils.