Background: This study presents research on the traditional knowledge regarding Gentian (Gentiana L.) plants and their utilization. Aim: The objective of the study is to explore traditional knowledge about Gentian plants, their medicinal and other uses in various local communities, as well as to identify their vernacular names. Materials and Methods: The research was conducted in certain regions of Mongolia and the Inner Mongolia Autonomous Region (IMAR), involving 190 cultural heritage bearers through 36 questionnaires. The collected data were analyzed to determine the utilization index and frequency index of Gentian plants, assessing how they are used in the respective regions. Results: The results indicated the identification of four species of Gentian plants: Gentiana algida, G. macrophylla, G. decumbens, and Gentianopsis barbata. The relative frequency indices in Mongolia showed high usage with values of 0.37 for G. macrophylla, 0.51 for G. decumbens, and 0.55 for Gentiana algida. In contrast, the values in IMAR were lower, with 0.08 for white Gentian, 0.18 for large-leaved Gentian, and 0.21 for creeping Gentian. These findings suggest that the utilization of Gentian plants is influenced by intensive livestock farming and agricultural practices in the area. Conclusion The use of Gentian plants varies across regions, and the cultural heritage bearers from both countries name them differently based on flower color, size, and local dialects. This study provides valuable information for preserving local traditional knowledge and can be beneficial for researchers and cultural heritage protectors.