The purpose of this study was to estimate the size, density, probability of survival (φ) and detection (p) and habitat conditions of a population of Golden Poison Frog ( Phyllobates terribilis , Dendrobatidae) of Naya River, Buenaventura, Colombia. Three plots of 1000 m2 were sampled four times in January, 2015. Population data were analyzed through the Jolly-Seber model, using POPAN parameterization. Results indicate population size of 32.5 ± 4.3 ind. and population density of 0.011 ind/m2 . Values of φ and p were constant between plots; φ equaled 0.74 ± 0.08, and p 0.56 ± 0.13. The probability of survival and detection of this population are high in the location and period of study. Calculated density and population size may have a greater relation to resource availability or microclimatic conditions than to habitat modification because this population has levels of tolerance to environments with some degree of modification. High φ and p values may be associated with the duration of sampling, territorial habits, low predation, aposematism, and body size. The population of P. terribilis that was studied tolerates different environments with some degree of modification. This information will be useful to improve the conservation measures of this species, which is endemic to Colombia.