The Portulacaceae are a family of flowering plants, comprising 115 species in a single genus Portulaca.

It has a cosmopolitan distribution, with the highest diversity in semiarid regions of the Southern Hemisphere in Africa, Australia, and South America, but with a few species also extending north into Arctic regions.

The family is very similar to the Caryophyllaceae, differing in the calyx, which has only two sepals.

In the APG III system, several genera were moved to the Montiaceae, Didiereaceae, Anacampserotaceae and Talinaceae, thus making the family monotypic and only containing the genus Portulaca.

[1] The following species are accepted:[3] Common purslane (Portulaca oleracea) is widely consumed as an edible plant, and in some areas it is invasive.