Charles Felix (Italian: Carlo Felice Giuseppe Maria; 6 April 1765 – 27 April 1831) was the Duke of Savoy, Piedmont, Aosta and King of Sardinia from 1821 to 1831.

Carlo Felice di Savoia was born in Turin as the eleventh child and fifth son born to Victor Amadeus III of Savoy and Maria Antonia Ferdinanda of Spain. His paternal grandparents were Charles Emmanuel III of Savoy and his German wife Polyxena of Hesse-Rotenburg. His maternal grandparents were French born King Philip V of Spain and his Italian wife, Elisabeth Farnese.

He was a younger brother of two other rulers of Savoy Charles Emmanuel IV and Victor Emmanuel I. He spent his childhood with his sister Maria Carolina and Count of Moriana where they lived at the Castle of Moncalieri. Carlo Felice was reported as having a closed character, prone to loneliness, with an almost ascetic (which for some time, had flashed the ecclesiastical career) and a sacral conception of the monarchy and the right to reign. With the Napoleonic occupation of Piedmont in 1796, he lost the crown of Savoy, the Duchy of Savoy and area of Genevois. Carlo Felice, who was titled Duke of Genoa, obtained the title of Marquis of Susa in compensation for his nominal loss.

He was a younger brother of Charles Emmanuel IV and Victor Emmanuel I. He was not expected to ever succeed to the throne. However Charles Emmanuel never had any children and abdicated the throne on 4 June 1802. Victor Emmanuel had four living daughters when he abdicated the throne in 1821. As the succession was regulated by the Salic Law, Charles Felix succeeded his brother on the throne.

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