The Nectriaceae comprise a family of fungi in the order Hypocreales. It was circumscribed by brothers Charles and Louis René Tulasne in 1865. In 2020, an Outline of fungi was produced and listed 70 genera and about 1,336 species.

It is a highly diverse group with a worldwide distribution and it has higher diversity in warm temperate and tropical regions (Rossman et al. 1999; Rossman 2000; Chaverri et al. 2011, Schroers et al. 2011, Hyde et al. 2014, Lombard et al. 2015,). Several authors have studied and revised the taxonomy of Nectriaceae (Petch 1938; Munk 1957; Dennis 1960; Kreisel 1969; Rossman et al. 1999; Lumbsch and Huhndorf 2010; Lombard et al. 2015; Maharachchikumbura et al. 2016b). A recent treatment of Nectriaceae was provided by Wijayawardene et al. (2022), they also accepted 70 genera within the family.

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