Antrim, a maritime county of Ulster, stands second among the Irish counties in population, but in size only ninth. Its greatest length is 57 miles; its greatest breadth, 28; its extent of sea-coast, 90; and its area, 1192 sq. m. Of this, rather more than three-fourths is in tillage and pasture; and one per cent, under wood. Off the north coast lie Rathlin Isle and the Skerries; and off the east coast, the Maiden Rocks. The east coast is hilly; and from Larne to Fair Head, parallel ranges stretch SW. into the interior, forming valleys opening seaward, called the Glens of Antrim. The interior slopes towards Lough Neagh. The highest eminences are - Trostan, 1810 feet; and Slievemish, or Slemish, 1782. The principal streams are the Bann, from Lough Neagh to the Atlantic; the Main, running parallel to the Bann, but in the reverse direction, into Lough Neagh; and the Bush, flowing north into the Atlantic. Many peat-bogs occur. Between Ballycastle and the mouth of the Bann, the basalt assumes very picturesque forms; and the Giants' Causeway (q.v.) is one of the most perfect examples of columnar basalt in the world. Fine salt-mines occur at Duncrue and Carrick-fergus; small coal-fields near Ballycastle and in the interior; and rich beds of iron ore in Glen-ravel. The soil is mostly light, and the chief crop is oats. There are some linen, cotton, and coarse woollen manufactures. The towns are Lisburn, Ballymena, Ballymoney, Carrickfergus, Larne, and Antrim (pop. 1820). Belfast, most of which was formerly reckoned as in Antrim, is now wholly without the administrative county. County Antrim returns four members to parliament: Belfast borough, four. Pop. (1841)351,496; (1891) 427,968; (1901, excluding Belfast) 196,090 - over 99,000 Presbyterians, 41,000 Protestant Episcopalians, 40,400 Roman Catholics.