Many faunistic studies on the myrmecofauna of Bulgaria have been carried out and about 180 ant species (Hymenoptera, Formicidae) from 43 genera and six subfamilies have been discovered as a result. Although the Bulgarian ant fauna is considered to be relatively well studied, the finding of unrecorded species continues, especially amongst the rare social parasites and the species with a more southern distribution in the Balkans.The current study presents data on 11 ant species recorded for the first time in Bulgaria (Messor helleniusAgosti & Collingwood, 1987,M. mcarthuriSteiner et al., 2018,Crematogaster ioniaForel, 1911,Monomorium monomoriumBolton, 1987,Temnothorax aeolius(Forel, 1911), T. cf. exilis ( form darii Forel, 1911),T. finzii(Menozzi, 1925),T. rogeriEmery, 1869, Tetramorium cf. punicum,Plagiolepis xeneStärcke, 1936 andLasius reginaeFaber, 1967), as well as new locality data on 15 rarely found species. Some of the species, such asHypoponera eduardi(Forel, 1894),Strumigenys argiola(Emery, 1869),Temnothorax graecus(Forel, 1911),Tetramorium diomedeumEmery, 1908,Camponotus ioniusEmery, 1920 andC. tergestinusMüller, 1921, have been known so far only from a single locality in Bulgaria.The dataset of all records presented in this work was published separately through Global Biodiversity Information Facility (GBIF, https://doi.org/10.15468/mngbzp).