| Dalseo | |
| Native Name Lang: | ko |
| Settlement Type: | Autonomous District |
| Translit Lang1: | Korean |
| Translit Lang1 Type1: | Hanja |
| Translit Lang1 Info1: | 達西區 |
| Translit Lang1 Info2: | Dalseo-gu |
| Translit Lang1 Info3: | Talsŏ-gu |
| Subdivision Type: | Country |
| Subdivision Name: | South Korea |
| Subdivision Type1: | Region |
| Subdivision Name1: | Yeongnam |
| Subdivision Type2: | Provincial level |
| Subdivision Name2: | Daegu |
| Leader Title: | Mayor |
| Leader Name: | Lee Tae-hoon(이태훈) |
| Subdivision Type3: | Administrative divisions |
| Area Total Km2: | 62.34 |
| Population As Of: | September 2024[1] |
| Population Total: | 523,712 |
| Population Density Km2: | 8895 |
| Population Blank1 Title: | Dialect |
| Population Blank1: | Gyeongsang |
Dalseo District 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.