Eucalyptus strzeleckii is a member of the swamp gum group, probably most closely related to Eucalyptus ovata and E. brookeriana. It is a medium to tall forest tree growing to approximately 30 m high, identifiable from the glaucous new growth evident at the outside of crown that gives a blue-grey colouring to the crown. The species has small ovoid buds, and fruit that is broader than it is long. The species has loose, rough bark at the base of a whitish-grey, with red mottling, trunk. Adult leaves are lancolate or ovate, asymmetrical, dark green and glossy.
Immature trees may have copious fibrous grey-brown bark on the trunk, and alternate, glossy green leaves that are darker on one side than the other.