Louise of Lorraine (Louise Henriette Gabrielle; 30 December 1718 – 5 September 1788) was a French noblewoman and member of the House of Lorraine. She married into the House of La Tour d'Auvergne and was Duchess of Bouillon.

Born to Charles Louis de Lorraine, Count of Marsan, Prince of Mortagne, and his wife Élisabeth de Roquelaure, she was the second of four children. Her younger brother, Gaston Jean Baptiste Charles, was the husband of Marie Louise de Rohan, future governess of Louis XVI and his siblings. Gaston died of Smallpox aged twenty two. Her younger brother was Camille, Prince of Marsan.

She was known simply as Louise. Styled Mademoiselle de Marsan prior to her marriage, as a male line descendant of the House of Lorraine she was entitled to the style of Highness.

She was a Canoness of the prestigious Remiremont Abbey in Remiremont, in the Vosges in Lorraine. Remiremont had been closely related to the Lorraine's for centuries. She was nominated as Canoness in 1733.

She was engaged to Godefroy de La Tour d'Auvergne, only son and heir of Charles Godefroy de La Tour d'Auvergne and his Polish born wife Maria Karolina Sobieska. The couple were married on 27 November 1743. Her husband, as heir to the Duchy of Bouillon, was styled prince de Turenne; as such, Louise became the Princess of Turenne. The couple's marriage was carried out by the Cardinal d'Avergne, her husband's cousin; they wed in the Hôtel of her younger brother, Louis Camille de Lorraine. Her husband was nine years younger than she.

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