This is a list of the bird species recorded in Mongolia. The avifauna of Mongolia include a total of 534 species.
This list's taxonomic treatment (designation and sequence of orders, families and species) and nomenclature (common and scientific names) follow the conventions of The Clements Checklist of Birds of the World, 2022 edition. The family accounts at the beginning of each heading reflect this taxonomy, as do the species counts found in each family account. Accidental species are included in the total species count for Mongolia.
The following tags have been used to highlight several categories. The commonly occurring native species do not fall into any of these categories.