Adachi (安達郡 Adachi-gun?) is a district located in Fukushima Prefecture, Japan. As of January 2007, the district has a population of 8,577 and an area of 79.46 km², for a population density of 107.9 per km².
Prior to the merger, as of 2003, the district had an estimated population of 68,436 and a density of 178.99 persons per km². The total area was 382.34 km².
Coordinates: 37°32′41″N 140°20′16″E / 37.5447602°N 140.3378622°E