A complete bibliographic review of Western Mountain Coati Nasuella olivacea was made to improve and disseminate the state of knowledge about the species in the Colombian portion of its range. Reports are distributed across the three ranges of the Northern Andes in Colombia (West, Central, and East), but little is known about the biology, ecology or natural history of the species. In total, 53 georeferenced records were compiled for Colombia plus some confirmed records for Ecuador. All the records ranged from 1,300 to 4,000 m in the high Andean forests and páramo biomes; these elevations represent some of the most disturbed habitats in the country. There is little information about the species’s conservation status but it is probably threatened by habitat loss, hunting and human–wildlife conflict. It is potentially present in 10.11% of the protected areas within the Colombian portion of the Tropical Andes hotspot. With this first published review of the state of knowledge of the species, and the first explicit extent of occurrence estimation, we propose that it be considered Near Threatened on the IUCN Red List of Threatened Species.