João Rodrigues de Sá (c.1555 – ? ) was the first Count of Penaguião, a Portuguese title. He was succeeded by his son Francisco de Sá de Menezes (1598–1647) and then his son João Rodrigues de Sá e Menezes (1619–1658). His son Francisco de Sá e Menezes (c.1640–1677) was also 1st Marquis of Fontes and his son João Rodrigo de Sá e Menezes succeeded him. His brother João Rodrigues de Sá Menezes (1674–1688) came next and was also 2nd Marquis of Fontes.