Siloxerus is a genus of Australian plants in the tribe Gnaphalieae within the family Asteraceae endemic to Australia. Plants in the genus usually have leaves in a rosette at the base of the plant or sessile stem leaves, and disc-like compounds heads of bisexual, tube-shaped yellowish flowers. The fruit is an oval, often purplish cypsela with a scaly white pappus.

The following species of Siloxerus are accepted by Plants of the World Online as of November 2025:

• Siloxerus filifolius (Benth.) Ostenf.
• Siloxerus humifusus Labill.
• Siloxerus multiflorus (Nees) Entwisle
• Siloxerus pygmaeus (A.Gray) P.S.Short
• Siloxerus tomentosus (J.C.Wendl.) Ostenf.

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