| Seongdong | |
| Native Name Lang: | ko |
| Official Name: | Korean: {{nobold|성동구 · 城東區 |
| Settlement Type: | Autonomous District |
| Flag Alt: | Flag of Seongdong |
| Pushpin Map Caption: | |
| Subdivision Type: | Country |
| Subdivision Name: | South Korea |
| Subdivision Type1: | Region |
| Subdivision Name1: | Sudogwon |
| Subdivision Type2: | Special City |
| Subdivision Name2: | Seoul |
| Subdivision Type3: | Administrative dong |
| Subdivision Name3: | 20 |
| Leader Party: | Democratic |
| Leader Title: | Mayor |
| Leader Name: | Chong Won-oh |
| Leader Title1: | MNAs |
| Area Total Km2: | 16.85 |
| Population Total: | 275,403 |
| Population As Of: | October, 2022,[1] September 2024[2] |
| Population Density Km2: | auto |
| Timezone1: | Korea Standard Time |
| Utc Offset1: | +9 |
| Postal Code Type: | Postal code |
| Postal Code: | 04700 – 04899 |
| Area Code Type: | Area code(s) |
| Area Code: | +82-2-2200,400 |
| Website: | Seongdong District official website |
| Governing Body: | Seongdong-gu Council |
Seongdong District is one of the 25 gu which make up the city of Seoul, South Korea. It is situated on the north bank of the Han River. It is divided into 20 dong (neighbourhoods).[3]
Seongdong District consists of 20 administrative dongs (haengjeong-dong, Korean: 행정동)
When Seoul was expanding outward on its size, many parts of Gyeonggi Province were merged to Seongdong District. However, due to its extraordinarily huge size, Seoul Metropolitan Government divided the district into 5 (Gangnam District, Gangdong District, Gwangjin District, Seongdong District, and Songpa District), and made Seongdong District cede some part of the district to Jung District. Yeongdeungpo District, Seodaemun District, Seongbuk District, and Dongdaemun District underwent similar changes.
Hanyang University, a prestigious university in South Korea, is located in Haengdang-dong and Sageun-dong.
Cobb County, Georgia, United States