The following is a list of ecoregions in Guinea Bissau, according to the Worldwide Fund for Nature (WWF).
Guinea-Bissau is in the Afrotropical realm. Ecoregions are listed by biome.
By bioregion:
Conservation status is a measure used in conservation biology to assess an ecoregion's degree of habitat alteration and habitat conservation. It is used to set priorities for conservation.
A bioregion is an ecologically and geographically defined area that is smaller than a biogeographical realm, but larger than an ecoregion or an ecosystem, in the World Wide Fund for Nature classification scheme. There is also an attempt to use the term in a rank-less generalist sense, similar to the terms "biogeographic area" or "biogeographic unit".