Bangor (băngˈgər) [key], town (1991 pop. 70,750), North Down dist., E Northern Ireland, on Belfast Lough. It is a seaport, resort, and yachting center (site of an annual regatta), with some light industry. The Elizabethan Bangor Castle is in the town along with the remains of an abbey founded c.555 by St. Comgall and destroyed by the Danes in the 9th cent. Rebuilt in 1120, it was taken over by Franciscans in 1469. The missionary abbey was dissolved in 1542.