Tsaagan is a member of the group Dromaeosauridae. A cladistic analysis by Norell et al. originally indicated it was more precisely a member of the Velociraptorinae.
Tsaagan is part of the group Dromaeosauridae, which also includes other related species. A phylogenetic study by Norell et al. initially placed it within the Velociraptorinae subfamily, highlighting its close relationship to velociraptors.