Eucalyptus wimmerensis, commonly known as the Wimmera mallee box, is a mallee that is native to South Australia. The multi stemmed and often erect mallee typically grows to height of 12 metres (39 ft) and has rough bark on the trunk and smooth, grey to tan to cream bark above or is smooth throughout. Adult leaves are glossy and green and have a blade that is 80 millimetres (3.1 in) long and 15 mm (0.6 in) wide with a linear-lanceolate to narrow-lanceolate shape. Flowers are axillary and form in in groups of 7-11 with buds that are 6 mm (0.24 in) long and 4 mm (0.16 in) wide. Flowers are white in colour and bloom between November and April. It will then form a barrel-shaped fruit that is 6 mm (0.24 in) long with the same width.