Luise Marie of the Palatinate (Luise Marie von der Plafz; 23 July 1647 – 11 March 1679) was a Bavarian princess who married the fuerst of Salm-Salm. A niece of Sophia of Hanover, she and her family, as Catholics, were excluded from the line of succession to the British throne.
She was the eldest daughter of the landless Edward of the Palatinate and his French-Italian wife, Anna Gonzaga. She was probably named after both her mother's sister and her father's sister, Ludwika Maria Gonzaga, Queen of Poland (in German, Louise Marie) and Louise Marie of the Palatinate, respectively. Her younger sisters were Anne Henriette, wife of the Henri Jules, Prince of Condé and Benedicta Henrietta, wife of John Frederick, Duke of Brunswick-Lüneburg. On her father's side, she was a first cousin of King George I of Great Britain and Elizabeth Charlotte of the Palatinate.
On March 20, 1671, she married Charles Theodore, Prince of Salm.[1] He was a great-great-grandson of Anna of Lorraine. They had four children, a son named Louis Otto who became the last Prince of Salm-Salm, and three daughters, Louise, louise Appolonia, and Eleanor Christina,[1] two of whom died without issue.