The coat of arms of Prince Edward Island, officially the King's Arms in Right of Prince Edward Island, are the coat of arms of Prince Edward Island, being the arms of King Charles III in right of the province. They were created when the shield and motto in the achievement were granted in 1905 by royal warrant from King Edward VII. The latest iteration was given by the Canadian Heraldic Authority in 2002.

By the arrangements of the Canadian federation, the Canadian monarchy operates in Prince Edward Island as the core of the province's Westminster-style parliamentary democracy. As such, the Crown within Prince Edward Island's jurisdiction is referred to as the Crown in Right of Prince Edward Island, His Majesty in Right of Prince Edward Island, or the King in Right of Prince Edward Island. The Constitution Act, 1867, however, leaves many royal duties in Prince Edward Island specifically assigned to the sovereign's viceroy, the lieutenant governor of Prince Edward Island, whose direct participation in governance is limited by the conventional stipulations of constitutional monarchy.