In this study, it was aimed to outline the invertebrate fauna of Muğla province, which is located in the southwestern Turkey and is one of the regions rich in terms of biodiversity. In this context, studies on all invertebrate animal groups throughout the province (national and international articles, undergraduate and graduate theses, congress and symposium proceedings, book chapters, other publications, etc.) were investigated. According to literature review, 1589 different taxa belonging to 5 different phyla was found. All found taxa are presented at species and genus level, and their conservation statuses such as BERN, CITES, IUCN are also noted. Additionally, comments were given about the endemism status for taxa reported at the species level. When looking at the distribution of taxa reported from across the province according to phyla, flatworms (Platyhelminthes) are represented by 5 taxa, annelids (Annelida) by 9 taxa, wheeled animals (Rotifera) by 62 taxa, molluscs (Mollusca) by 5 taxa, and arthropods (Arthropoda) by 1508 taxa. It has been observed that there are no species included in the BERN and CITES Convention statuses in the relevant taxa, and the majority of the species are in the NE (not yet evaluated) group in terms of IUCN criteria. In addition, many species from the orders Odonata (dragonflies and damselflies) and Lepidoptera (lepidopterans) were found to be in the LC (least concern) group. About the taxa under risk, Zonites casius from the Mollusca phylum and Cerambyx dux with Libellula pontica from the Arthropoda phylum are in the NT (near threatened) status. Onychogomphus forcipatus, an Odonata species, has been found as VU (vulnerable) status, another
odonate species, Cordulegaster insignis, and a mollusc species, Unio crassus, have been found as EN (endangered) status. In addition, when the endemism status of Muğla invertebrates was examined, it was understood that all 21 species identified were in the Arthropoda phylum. This study is aimed to contribute to the reveal of Turkey's invertebrate fauna.