[Objectives] Species diversity and geographical distribution are important basis for wildlife research and protection. Therefore, updating the list and fauna of reptiles in Liaoning Province will further lay the foundation for ecological research and protection of the reptiles distributed in the area. [Methods] We updated the list of reptiles in Liaoning Province based on published research literature and recent field investigations. On this basis, according to the composition of reptile species and the distribution range of representative species in various regions, adjustments were made to the reptile geographical flora of Liaoning Province. [Results] Based on the existing research and field investigation of reptiles in Liaoning Province, the checklist and zoogeographic division of the Reptilian Fauna of Liaoning Province were revised. The distribution of Elaphe taeniura in Liaoning Province was further confirmed with the image of E. taeniura from Lingyuan (Fig. 1). Two new snake species are newly recorded in Liaoning Province, which are Ptyas dhumnades (Fig. 2, Fig. 3) and Sibynophis chinensis (Fig. 4). And supplementary description based on an E. carinata specimen from Huludao City (Fig. 5). Up to May 2023, 37 species belonging to 21 genera and 11 families of 2 orders were recorded in Liaoning Province, including 5 species of Testudines in 4 genera, 3 families, 10 species of Lacertilia in 5 genera, 3 families, and 22 species of Serpentes in 12 genera, 5 families (Appendix 1). Reptiles include 3 species listed in category Ⅰ of wild animals under special state protection of China and 6 species listed in category Ⅱ of wild animals under special state protection of China. In addition, 15 species were evaluated as threatened species by China’s Red List of Biodiversity:Vertebrates Volume Ⅲ, Reptiles. According to the latest information on reptile distribution, Liaoning Province was divided into six zoogeographical provinces, which are the eastern hills of Liaoning, the hills of Liaodong Peninsula, Liaohe Plain, the sands and platforms of northern Liaoning, western hills of Liaoning, and the end of the Yanshan Mountains (Fig. 6, Table 1). The end of Yanshan Mountain is the newly added zoogeographical province in this study. And the former hills of the Liaodong Peninsula were expanded. [Conclusion] According to the geographical distribution of reptiles in Liaoning, the end of Yanshan Mountain has the richest species diversity of reptiles, while the sands and platforms of northern Liaoning have the least. In some parts of Liaoning, the habitat of reptiles has been destroyed, leading to a decrease in the number of them. In addition, artificially bred Pelodiscus sinensis entering the wild may damage the population of indigenous P. maackii. Therefore, we suggest establishing more natural reserves and limiting the entry of artificially bred P. sinensis into the wild to protect the diversity of reptiles in Liaoning Province.