Luigi Cornaro (12 February 1517 – 10 May 1584) was an Italian Roman Catholic cardinal and bishop.
A member of the House of Cornaro, Luigi Cornaro was born on February 12, 1517, the eldest of the ten children of Giovanni Cornaro, Venetian senator and Procurator of San Marco, and Adriana Pisani. His younger brother Federico Cornaro also became a cardinal. He was the grand-nephew of Catherine Cornaro, Queen of Cyprus, and the nephew of Cardinals Francesco Pisani, Marco Cornaro, and Francesco Cornaro. His cousin Andrea Cornaro also became a cardinal.
As a young man, he joined the Knights Hospitaller, becoming Grand Prior of Cyprus, an office he later resigned in favor of his younger brother Federico Cornaro.
Pope Julius III made him a cardinal deacon in the consistory of November 20, 1551. He received the red hat and the deaconry of San Teodoro on December 4, 1551.
On June 25, 1554, he was elected Archbishop of Zadar and was subsequently consecrated as a bishop. He resigned the government of Zadar on July 17, 1555 in favor of his secretary, Muzio Callini.