The Chaetosphaeriaceae are a family of fungi in the Ascomycota, class Sordariomycetes.

[1] The family was circumscribed by Martina Réblová, Margaret Elizabeth Barr Bigelow, and Gary Samuels in 1999.

[2] Species in the family have a cosmopolitan distribution, and are found in both temperate and tropical climates.

[3] Fossils of the Chaetosphaeriaceae are known from the Carboniferous, Eocene, Oligocene, Miocene and more recent sediments.

[4] As accepted by GBIF;[5] Figures in brackets are approx.