Zieria compacta is an erect, bushy shrub which grows to a height of about . The branches are smooth and lack obvious glands but are covered with a dense layer of hairs, especially when young. Its leaves are composed of three elliptic to egg-shaped leaflets with the middle leaflet long and wide and the others smaller. The leaf stalk is long. The upper surface of the leaves is
glabrous and dark green while the lower surface is a paler green, covered with a thin, dense layer of hairs and has an obvious mid-vein. The flowers are white to pale pink and are arranged in groups of mostly six flowers (but sometimes as few as one or as many as 35) in leaf
axils. The groups are usually about as long as the leaves. The four
sepal lobes are about long and hairy on the outside. The four petals are long and in common with other zierias, there are only four
stamens. Flowering occurs in spring and is followed by fruit which is a glabrous
follicle composed of up to four sections joined at the base and which burst open to release their seeds when ripe. ==Taxonomy and naming==