Laos is in the Indomalayan realm. Ecoregions are sorted by biome.

Tropical and subtropical moist broadleaf forests edit

• Luang Prabang montane rain forests
• Northern Annamites rain forests
• Northern Indochina subtropical forests
• Northern Khorat Plateau moist deciduous forests
• Northern Thailand-Laos moist deciduous forests
• Northern Vietnam lowland rain forests
• Southern Annamites montane rain forests

Tropical and subtropical dry broadleaf forests edit

• Central Indochina dry forests
• Southeastern Indochina dry evergreen forests

The freshwater ecoregions of Laos include:

• Mekong

• Wikramanayake, Eric; Eric Dinerstein; Colby J. Loucks; et al. (2002). Terrestrial Ecoregions of the Indo-Pacific: a Conservation Assessment. Washington, DC: Island Press