CATHERLOUGH, or Carlow, a county of Ireland, about 28 miles in length, and eight in breadth; bounded on the east by Wicklow and Wexford, on the west by Queen's county, on the north by Kildare, and on the south and south-west by Wexford. It contains five baronies, 50 parishes, 13,000 houses, and 78,000 inhabitants. The county sends one member, and the town another to the imperial parliament. See CARLOW, SUPPLEMENT.