We report the sighting of a mangrove cuckoo (Coccyzus minor) in June 2019 at Parque Bicentenario, Mexico City, Mexico. This record from the Trans-Mexican Volcanic Belt (TMVB) is 182 km from the closest published record within the TMVB, and 217 km away from its known distribution range in the Atlantic Slope and 475 km from the Pacific Slope. This sighting, and several recent sightings during the breeding season, might indicate dispersal into a new biogeographic province from its predominantly lowland range. Within this biogeographic province, this finding helps to better understand its distribution and habitat use in Mexico.