- Corylus americana – American hazel, eastern North America
- Corylus avellana – Common hazel, Europe and western Asia
- Corylus heterophylla – Asian hazel, Asia
- Corylus yunnanensis – Yunnan hazel, central and southern China
- Corylus colchica – Colchican filbert, Caucasus
- Corylus cornuta – Beaked hazel, North America
- Corylus maxima – Filbert, southeastern Europe and southwest Asia
- Corylus sieboldiana – Asian beaked hazel, northeastern Asia and Japan (syn. C. mandshurica)
- Corylus chinensis – Chinese hazel, western China
- Corylus colurna – Turkish hazel, southeastern Europe and Asia Minor
- Corylus fargesii – Farges' hazel, western China
- Corylus jacquemontii – Jacquemont's hazel, Himalaya
- Corylus wangii – Wang's hazel, southwest China
- Corylus ferox