| Occupation: | Historian, diplomat, genealogist, lawyer, professor |
| Birth Date: | October 7 1915 |
| Death Date: | July 14 2005 |
| Birth Place: | Lima, Peru |
| Death Place: | Lima, Peru |
| Office: | Permanent Delegate of Peru to UNESCO |
| Term Start: | 1974 |
| Term End: | 1977 |
Guillermo Lohmann Villena (1915–2005) was a Peruvian diplomat, historian, lawyer, and writer.
He is considered one of the most prolific Peruvian historians and the most important specialist in the viceregal era. He also served as Permanent Delegate of Peru to UNESCO from 1974 to 1977.
He attended the Deutsche Schule Alexander von Humboldt Lima (Colegio Peruano-Alemán Alexander von Humboldt).[1]