Spergularia villosa is a species of flowering plant in the family Caryophyllaceae known by the common name hairy sandspurry.

[1] It is native to southern South America, and it is known in the southwestern United States and Baja California as an introduced species and casual weed.

It is a small perennial herb producing a sprawling stem up to 30 centimeters long with a woody base.

The leaves are generally linear in shape and measure a few centimeters long.

The flowers have hairy, glandular sepals and five oval whitish petals.