Auerbach is a town in Upper Austria, Austria. Its length from north to south is 4.3 km and from east to west is 5 km; its area is 10.78 km². In 201…Auerbach is a town in Upper Austria, Austria. Its length from north to south is 4.3 km and from east to west is 5 km; its area is 10.78 km². In 2015, it had 565 inhabitants.