威尔士王妃（Princess of Wales）是给英国威尔士亲王之妻的名衔。因为许多威尔士亲王在登上王位、或逝世之前都没有结婚，因此实际上只有九位威尔士王妃。

：那可能是非正式行礼的婚姻

Princess of Wales (Welsh:Tywysoges Cymru) is a British courtesy title held by the wife of the Prince of Wales, who is, since the 14th century, the heir apparent of the English or British monarch. The first acknowledged title holder was Eleanor de Montfort, wife of Llywelyn ap Gruffudd. It has subsequently been used by wives of post-conquest princes of Wales.