- Source: San Martino in Rio
- Campogalliano
- Carlo Emanuele I dari Savoia
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- Blue Sky Studios
- Fernando de Magelhaens
- Skuad Piala Dunia FIFA 2010
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- San Martino in Rio
- Rio San Martino
- San Carlo Borromeo, San Martino in Rio
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- List of longest-reigning monarchs
- Duke of Ferrara and of Modena
- Sigismondo d'Este (1433–1507)
- San Carlo Borromeo (disambiguation)
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San Martino in Rio (Reggiano: Sân Martèin Grand) is a comune (municipality) in the Province of Reggio Emilia in the Italian region Emilia-Romagna, located about 50 kilometres (31 mi) northwest of Bologna and about 12 kilometres (7 mi) northeast of Reggio Emilia. Remarkable the church of San Carlo Borromeo.
San Martino in Rio borders the following municipalities: Campogalliano, Correggio, Reggio Emilia, Rubiera.