This list includes all eucalypt names, those taxa accepted in EUCLID and previously published names.

Eucalyptus xanthoclada Brooker & A.R.Bean = E. crebra
Eucalyptus xanthonema Turcz. subsp. xanthonema
Eucalyptus xanthonema subsp. apposita Brooker & Hopper
Eucalyptus xanthope A.R.Bean & Brooker = Corymbia xanthope
Eucalyptus xerothermica L.A.S.Johnson & K.D.Hill
Eucalyptus yagobiei Maiden = reputed hybrid E. microtheca × E. albens
Eucalyptus yalatensis Boomsma
Eucalyptus yangoura Blakely = E. globoidea
Eucalyptus yarraensis Maiden & Cambage
Eucalyptus yilgarnensis (Maiden) Brooker
Eucalyptus youmanii Blakely & McKie
Eucalyptus youmanii var. sphaerocarpa Blakely & McKie = E. stellulata × E. youmanii
Eucalyptus youngiana F.Muell.
Eucalyptus yumbarrana Boomsma
Eucalyptus yumbarrana subsp. striata Boomsma = reputed hybrid E. canescens × E. vokesensis
Eucalyptus zopherophloia Brooker & Hopper
Eucalyptus zygophylla Blakely = Corymbia zygophylla