Eucalyptus spathulata, commonly known as swamp mallet, is a species of Eucalyptus which is endemic to Western Australia. It is a mallet that grows to 8 metres high and has smooth bark and narrow leaves.
The species was formally described in 1844 by botanist William Jackson Hooker in Icones Plantarum. Two subspecies are recognised:
E. spathulata subsp. salina D.Nicolle & Brooker
E. spathulata Hook. subsp. spathulata
It is widely cultivated in southern Australia and can be grown in saline and poorly drained situations.