| Order: | 9th Lifetime Doge of the Republic of Genoa |
| Term Start1: | 7 April 1383 |
| Term End1: | 14 June 1384 |
| Predecessor1: | Federico di Pagana |
| Successor1: | Antoniotto Adorno |
| Birth Date: | 1319 |
| Birth Place: | Ceranesi, Republic of Genoa |
| Death Date: | 14 June 1384 |
| Death Place: | Genoa, Republic of Genoa |
| Party: | Popolani |
Leonardo Montaldo or di Montaldo (1319 - 14 June 1384[1]) was a statesman who became the 7th doge of the Republic of Genoa.
Leonardo was born in San Martino di Paravanico, near modern-day Ceranesi in the Polcevera valley. His family was from Gavi.[2] Little is known of his life before the dogate. He was elected by a commission[3] despite the fact that a large share of the population supported Antoniotto Adorno. According to some sources, Montaldo had accepted to rule the Republic only for six months, although his term went past six months.[4]
Once in office, like his predecessors, Montaldo tried to reorganize the Republic and in particular the fiscal system. But on 11 June 1384 it became clear that he had contracted the plague during an outbreak in the city and he died in Genoa three days later. Antoniotto Adorno was elected doge the next day.