Princess consort is an official title or an informal designation normally accorded to the wife of a sovereign prince. The title may be used for the wife of a king if the more usual designation of queen consort is not used.

More informally, it may even be used to describe the family position of any woman who marries royalty non-morganatically, if the rank she derives from that marriage is at least that of a princess (e.g., Grace Kelly was Princess Consort during marriage, whereas Liliane Baels and Countess Juliana von Hauke are not usually so described).