The following is a list of ecoregions in Greece as identified by the World Wide Fund for Nature (WWF).

Greece is in the Palearctic realm. Ecoregions are listed by biome.

Temperate broadleaf and mixed forests

• Balkan mixed forests
• Rodope montane mixed forests

Mediterranean forests, woodlands, and shrub

• Illyrian deciduous forests
• Pindus Mountains mixed forests
• Aegean and Western Turkey sclerophyllous and mixed forests
• Crete Mediterranean forests

• Aegean drainages
• Ionian drainages
• Southeast Adriatic drainages
• Thrace
• Vardar
• Western Anatolia

Greece's seas are in the Mediterranean Sea marine province of the Temperate Northern Atlantic marine realm.

• Aegean Sea
• Ionian Sea