The Northern Vietnam lowland rain forests ecoregion (WWF ID: IM0141) covers the central-eastern coast of Vietnam from the Red River delta in the north to Tam Kỳ in the center of the country and neighboring adjacent parts of Laos.

[3] The primary wet evergreen forest has mostly been cleared in the past by humans; by one estimate only 10% of the original remains.

The original wet evergreen forest has been mostly broken up by human agriculture and use, and now exists in scattered patches.

The highest tier is dominated by trees of the Hopea genus, Castanopsis hystrix and Madhuca pasquieri.

[6] The ecoregion supports some rare animals, including the largest viable population of the critically endangered Northern white-cheeked gibbon (living in Pu Mat National Park), the critically endangered Red-shanked douc, and populations of Gray langurs (a genus of Old world monkey).