| Patrizio Gennari | |
| Birth Date: | 24 November 1820 |
| Birth Place: | Moresco, Italy |
| Death Date: | 1 February 1897 |
| Death Place: | Cagliari, Italy |
| Nationality: | Italian |
| Fields: | Botany |
| Author Abbrev Bot: | Gennari |
Patrizio Gennari (24 November 1820, in Moresco – 1 February 1897, in Cagliari) was an Italian botanist and patriot. He served in the Second Italian War of Independence (the Austro-Sardinian War). From 1866 to 1892, he was a professor at the University of Cagliari, Sardinia, and director of the university's botanic garden, the Orto Botanico dell'Università di Cagliari. The orchid genus Gennaria is named after him.