| Luise Marie of the Palatinate | |
| Princess of Salm | |
| Birth Date: | 23 July 1647 |
| Birth Place: | Paris, France |
| Death Place: | Aachen |
| House: | Palatinate-Simmern (by birth) Salm (by marriage) |
| Spouse: | Charles Theodore, Prince of Salm |
| Father: | Edward, Prince Palatine |
| Mother: | Anna Gonzaga |
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| Issue: | Princess Luise Apollonia of Salm Louis Otto, Prince of Salm Eleonore, Duchess d'Ursel |
Luise Marie of the Palatinate (Luise Marie von der Plafz; 23 July 1647 - 11 March 1679) was a Palatine princess who married Charles Theodore, the Prince (Fürst) of Salm-Salm. A great-granddaughter of James I of England and niece of Sophia, Electress 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 Prince Palatine Edward and his French-Italian wife, Anna Gonzaga. She was probably named after her mother's sister, Ludwika Maria Gonzaga, Queen of Poland (in German, Louise Marie). Her younger sisters were Anne Henriette, wife of Henri Jules, Prince de Condé and Benedicta Henrietta, wife of John Frederick, Duke of Brunswick-Lüneburg. On her father's side, she was a first cousin of George I of Great Britain and Elisabeth Charlotte, Duchess of Orléans.
On March 20, 1671, she married Charles Theodore, Prince of Salm, member of the House of Salm. They had four children: