Rinaldo d'Este (26 April 1655 – 26 October 1737) was Duke of Modena and Reggio from 1695 until his death, as well as a member of the House of Este. He was succeeded by his son.

Born at the Ducal Palace of Modena, he was the only son of the third marriage of Francesco I d'Este, Duke of Modena. His mother was Lucrezia Barberini, daughter of Taddeo Barberini and Anna Colonna.

Created cardinal on 2 September 1686, he left the ecclesiastical career in 1694 to succeed his nephew Francesco II as duke. He married Princess Charlotte Felicitas of Brunswick-Lüneburg (1671–1710), eldest daughter of Johann Friedrich, Duke of Brunswick-Lüneburg and Benedicta Henrietta of the Palatinate. He hoped that this marriage to a German princess would provide him needed support from the various German royal houses, including the Habsburgs, who were connected to his wife by blood.

Rinaldo married Charlotte in Modena on 11 February 1696. Rinaldo wanted to encourage relations between Modena and Brunswick, whose ruling house was the House of Hanover. The marriage was celebrated splendidly despite financial problems in Modena; the artist Marcantonio Franceschini was commissioned to paint a room, the Salone d'onore at the ducal palace in honour of the marriage.

Charlotte died at the Ducal Palace of Modena after giving birth to a daughter in September 1710. The child also died. She was buried at the Church of San Vincenzo in Modena. Her son succeeded as Duke of Modena in 1737.

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