ANDREASBERG, a town of Prussia, in the former kingdom of Hanover, situated in the Hartz mountains, at an elevation of nearly 2000 feet above the level of the sea, and at a distance of about 10 miles S.E. from Clausthal. It contains 3321 inhabitants, many of whom are employed in the manufacture of lace, thread, or matches. In the vicinity there are valuable mines of silver, iron, lead, cobalt, arsenic, and copper.