Norroy and Ulster King of Arms is a heraldic title in the United Kingdom, responsible for overseeing matters related to coats of arms and heraldry in the northern regions of England and Northern Ireland. This position is one of the principal heralds, and it plays a crucial role in the official recognition and registration of armory. The title has historical significance, dating back to the 15th century, and is part of the College of Arms, which is based in London. The Norroy and Ulster King of Arms also participates in ceremonial functions and represents the monarchy in heraldic matters within its jurisdiction.