Eucalyptus ignorabilis is a species of small to medium-sized tree that is endemic to southeastern Australia.

Eucalyptus ignorabilis is a tree that typically grows to a height of 20 m (66 ft) and forms a lignotuber.

[2][3][4][5] Eucalyptus ignorabilis was first described in 1991 by Lawrie Johnson and Ken Hill from a specimen they collected near Seaton in 1986.

[5][6] The specific epithet is from the Latin ignorabilis, 'unknown', referring to the previous inclusion of this species with E.

[2][5] This eucalypt grows in woodland in sandy soil in swampy areas south from the Nadgee Nature Reserve in New South Wales and sporadically as far west as Erica in Victoria.