Militello Rosmarino (Sicilian: Militiedddu) is a comune (municipality) in the Metropolitan City of Messina in the Italian region Sicily, located about 120 kilometres (75 mi) east of Palermo and about 80 kilometres (50 mi) west of Messina.

Militello Rosmarino developed as the local center of Roman-Byzantine and then Arab culture in the Middle Ages, in particular under the domination of the Normans (1000 A.D.), who built a castle at the time of Roger the Guiscard (1081).

The town belonged with San Marco d'Alunzio to the Regio Demanio until the Fourteenth Century.

In 1400 Martino d'Aragona granted Militello to Bernardo da Caprera who was followed by Enrico Rosso (1505).

During the nineteenth century many families left Militello for Sant'Agata, which started a demographic decline.