| Order: | 25th Lifetime Doge of the Republic of Genoa |
| Term Start1: | 28 March 1436 |
| Term End1: | 3 April 1436 |
| Predecessor1: | Dogeship vacant |
| Successor1: | Tomaso di Campofregoso |
| Birth Date: | 1380 |
| Birth Place: | Genoa, Republic of Genoa |
| Death Date: | 1458 |
| Death Place: | Genoa, Republic of Genoa |
Isnardo Guarco (Genoa, 1380 – Genoa, 1458) was an Italian politician, mercenary leader, plutocrat, and served as Doge of Genoa for one week.[1]
(IT) Sergio Buonadonna e Mario Mercenaro, Rosso doge. I dogi della Repubblica di Genova dal 1339 al 1797, 2ª ed., Zena, De Ferrari, 2018, ISBN 88-64-05998-9.