Dalseo District (Korean: 달서구; RR: Dalseo-gu) is a district in western Daegu, South Korea. It borders Dalseong County on the north, south, and west, and Seo-gu and Nam District on the east. It has a population of about 520,000, and an area of 62.34 square kilometers. The population rose dramatically in the 1990s, and has been approximately level since 2000.