An ecozone may refer to:
Biogeographic realm, the broadest biogeographic division of Earth's land surface (referred to as ecozone by BBC) Biome, a large collection of flora and fauna occupying a major habitat Bioregion, an ecologically and geographically defined area that is smaller than a biogeographical realm, but larger than an ecoregion Ecoregion, an ecologically and geographically defined area that is smaller than a bioregion Ecozone (Canada), one of 15 first-level ecological land classifications in Canada