Mantaro may refer to:
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Mantarō, a masculine Japanese given name
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Mantaro Valley
The Mantaro Valley, also known as Jauja Valley, is a fluvial inter-Andean valley of Junin region, east of Lima, the capital of Peru. The Mantaro River flows through the fertile valley which produces potatoes, maize, and vegetables among othe ...
, a valley in Peru
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Mantaro River
The Mantaro River ( es, Río Mantaro, qu, Hatunmayu) is a long river running through the central region of Peru. Its Quechua name means "great river". The word "Mantaro" may be a word originally from the Asháninka language, who live downstream ...
, a river in Peru
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