Eleonora Maria Teresa of Savoy (28 February 1728 – 14 August 1781) was a Savoyard princess, the eldest daughter of Charles Emmanuel III of Sardinia and his second wife Polyxena of Hesse-Rotenburg.

Eleonora Maria Teresa di Savoia was the second child and eldest daughter of Charles Emmanuel III, King of Sardinia and his second wife, the German Polyxena of the Landgraviate of Hesse-Rotenburg.

Her maternal cousins included Victor Amadeus II, Prince of Carignano and his younger sister the future princesse de Lamballe, both of which were born at the court of Savoy.

Her paternal grandmother Anne Marie d'Orléans died in August 1728 when Eleonora was six months old.

Thus she was the highest ranking female at the Savoyard court until the marriage of her brother, the future Victor Amadeus III to the Spanish Infanta Maria Antonietta in 1750.