The Pottiaceae are a family of mosses.

They form the most numerous moss family known, containing nearly 1500 species or more than 10% of the 10,000 to 15,000 moss species known.

[1] The family has four subfamilies and 83 genera.

[2] The GBIF also lists Morinia Cardot,[3] Saitoa,[4] Sebillea M.Bizot, 1974,[5] and Spruceella Müll.Hal., 1900[6] but with no subfamily details.

Subfamily Timmielloideae (and its two genera of Timmiella and Luisierella) have been transferred to a new family Timmiellaceae, due to molecular phylogenetic analysis in 2014.