The population of long-tailed macaques (Macaca fascicularis, Raffles 1821) in the Ratu Bagus Kuning Tomb Complex (KMRBK) Palembang is an urban population affected by environmental changes and interactions with human activities. Therefore, this study aims to determine the population structure and dynamics over a 25-year period. The study was conducted from December 2025 to February 2026 using a …