| Nañuhuaico | |
| Elevation M: | 4932 |
| Language: | Quechua |
| Location: | Peru, Cusco Region |
| Map: | Peru |
| Map Size: | 200 |
| Coordinates: | -13.1992°N -73.0753°W |
Nañuhuaico (possibly from Quechua ñañu thin (cylindrical objects), slim, wayq'u brook, "thin brook") is a 4932m (16,181feet) mountain in the Vilcabamba mountain range in the Andes of Peru. It is located in the Cusco Region, La Convención Province, Vilcabamba District. Nañuhuaico lies northwest of a mountain named Soirococha and north of a lake of that name, northeast of Panta.
Nañuhuaico (erroneously spelled Nunahuayco) is also the name of a stream which originates north of the mountain. It is a left affluent of the Hatun Wayq'u ("big brook") in the north whose waters flow to the Apurímac River as a right tributary.