爱德华王子岛（英语：Prince Edward Island，常简称为PEI；法语：Île-du-Prince-Édouard；苏格兰盖尔语：Eilean a' Phrionns或Eilean Eòin，米克马克语：Apekweit或Epikwetk）是加拿大东部海洋三省之一。爱德华王子岛省全境包含了与省同名的岛屿及周遭的离岛，此滨海省分的人口（135,851人，2006年时统计）和面积（5,683.91平方公里，2006年时统计）虽然都是全国最少，但却拥有全国最高的人口密度，达到每平方公里24.47人。除此之外，该岛也是全球面积排名第104位（全加拿大第23位）的岛屿。爱德华王子岛的命名源自于爱德华·奥古斯都王子，肯特与斯特拉森公爵（Prince Edward Augustus, Duke of Kent and Strathearn，英国维多利亚女王的父亲），首府为夏洛特敦（C******tetown）。

Prince Edward Island (PEI or P.E.I.; French:Île-du-Prince-Édouard) is a province of Canada consisting of the island of the same name, as well as several much smaller islands.

It is one of the three Maritime Provinces and is the smallest province in both land area and population. It is the only province of Canada to have no land boundary. The island has several informal names: "Garden of the Gulf," referring to the pastoral scenery and lush agricultural lands throughout the province; and "Birthplace of Confederation" or "Cradle of Confederation", referring to the C******tetown Conference in 1864, although PEI did not join Confederation until 1873, when it became the seventh Canadian province. The backbone of the economy is farming; it produces 25% of Canada's potatoes. Historically, PEI is one of Canada's older settlements and demographically still reflects older immigration to the country, with Celtic, Anglo-Saxon and French surnames being overwhelmingly dominant to this day.