El Rosario is a municipality in the northeastern part of the island of Tenerife in the Santa Cruz de Tenerife province, on the Canary Islands, Spain. The seat of the municipality is the town La Esperanza, in the mountainous interior of the island. The municipality includes the coastal town Radazul. The TF-1 motorway passes through the southern part of the municipality.
The population is 15,542 (2013), its area is 39.43 km².