List of ecoregions in Nigeria

The biogeographic regionalization of Earth's terrestrial biodiversity, known as Terrestrial Ecoregions of the World (TEOW), is made up of 867 ecoregions that are divided into 14 biomes. In addition to offering a comprehensive map of terrestrial biodiversity, TEOW also provides a global species database for ecological analyses and priority setting, a logical biogeographic framework for large-scale conservation strategies, a map for enhancing biogeographic literacy, and a foundation for the Global 200.

Similarly, another author indicated that there are 14 distinct biomes, including forests, grasslands, and deserts, among the 846 ecoregions that make up the area. Ecoregions vary in size; the island group of St. Peter and St. Paul Rocks in the Atlantic Ocean is only 6 km2, while the East Siberian Taiga is 39 million km2.

The following is a list of ecoregions in Nigeria, according to the Worldwide Fund for Nature.

Terrestrial ecoregions
by major habitat type

Tropical and subtropical moist broadleaf forests

 * Cameroonian Highlands forests
 * Cross–Niger transition forests
 * Cross–Sanaga–Bioko coastal forests
 * Niger Delta swamp forests
 * Nigerian lowland forests

Tropical and subtropical grasslands, savannas, and shrublands

 * East Sudanian savanna
 * Guinean forest–savanna mosaic
 * Mandara Plateau mosaic
 * Northern Congolian forest-savanna mosaic
 * Sahelian Acacia savanna
 * West Sudanian savanna

Montane grasslands and shrublands

 * Jos Plateau forest–grassland mosaic

Flooded grasslands and savannas

 * Lake Chad flooded savanna

Mangroves

 * Central African mangroves

Freshwater ecoregions
by bioregion

Nilo-Sudan

 * Bight Coastal
 * Lake Chad Catchment
 * Lower Niger-Benue
 * Niger Delta

West Coastal Equatorial

 * Northern West Coastal Equatorial

Marine ecoregions

 * Gulf of Guinea Central