Antoniotto di Montaldo (1368 - 25 July 1398) was the doge of Genoa in two occasions in 1392-1394.
Born in Ceranesi, the son of Leonardo Montaldo, who had also been doge, he was elected as doge on 16 June 1392 after his predecessor Antoniotto Adorno had resigned. However, for unknown reasons, he resigned on 15 July 1393 in favor of Pietro Campofregoso. This occurred in a period of political chaos of the Genoese Republic, and after just one day, on 16 July, Campofregoso resigned, to be replaced by Clemente di Promontorio; the latter, however, was deposed after a few hours by Francesco Giustiniano di Garibaldo, who reigned until 30 July.
In that date Antoniotto di Montaldo, after a struggle with Antoniotto Adorno, recovered the dogal title, which he kept until 24 May 1494. After losing the power, he took refuge in Savona. He died in 1398, perhaps in Genoa, and was buried in the church of San Bartolomeo degli Armeni
| Preceded by Antoniotto Adorno |
Doge of Genoa 16 June 1392 – 15 July 1393 |
Succeeded by Pietro Campofregoso |
| Preceded by Francesco Giustiniano di Garibaldo |
Doge of Genoa 30 August 1393 – 24 May 1394 |
Succeeded by Nicolò Zoagli |