Armagh (ärmäˈ) [key], district (1991 pop. 49,050), 258 sq mi (668 sq km), S Northern Ireland. Armagh rises from boggy, fertile lowlands in the north to barren hills in the south. It is the fruit-growing center of Northern Ireland; cattle, sheep, pigs, and poultry are also raised. Armagh was noted for its fine linen, which has diversified into synthetic fibers. The area was the center of much sectarian fighting in the 1970s through the 1990s.