Geordie refers to a person from the Tyneside region of England and the adjacent former coal mining areas of southeastern Northumberland (those from Wearside are Mackems, and County Durham people are Durhamites) or the dialect spoken by these people. There are a number of rival theories to explain how the term came about, though all accept that it derives from a familiar diminutive form of the name "George".

In recent times "Geordie" has also been used to refer to a supporter of Newcastle United football club no matter their origin, including people from outside the traditional area.