ANTRIM, the capital town of the county of Antrim, in Ireland, seated at the north end of the lake Lough Neagh, about six miles from the mouth of the bay, having a good road before it, with a pier near the place, within which vessels lie dry at low water. It was anciently a borough of great consequence, as appears from the mayor's being admiral of a considerable extent of coast, as well in Down as in this county; the corporation enjoying the customs paid by all vessels within those bounds, the creeks of Bangor and Belfast only excepted. This grant, however, the crown repurchased, and thereupon transferred the custom-house to Belfast, to which town it is now much inferior as well in size as in trade. It is, however, still a place of note, and formerly sent two members to the Irish house of commons. It gives the title of earl to the noble family of McDonnell.—At Antrim is a seat, with noble demesnes, and beautiful and highly cultivated lands, of the earl of Massareene. W. Long. 6. 26. N. Lat. 54. 45.