The dataset comprises a subset of the information recorded in Medina, N.G.; Mazimpaka, V.; Hortal, J. & Lara (2015). Catálogo de los briófitos epífitos que crecen en bosques de quercíneas del cuadrante noroccidental ibérico’, F. Bol. Soc. Esp. Briol. 44-45: 1-30. It contains 1479 occurrences of 78 epiphytic mosses species recorded from the northwest Iberian sector. The main purpose of the study design was to contribute to reduce the knowledge gaps on the distribution of Iberian epiphytic mosses. All the occurrences were obtained by a systematic survey.