| Gangdong | |
| Native Name Lang: | ko |
| Official Name: | Korean: {{nobold|강동구 · 江東區 |
| Settlement Type: | Autonomous District |
| Flag Alt: | Flag of Gangdong |
| 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: | 21 |
| Leader Party: | People Power |
| Leader Title: | Mayor |
| Leader Name: | Lee Soo-Hee |
| Leader Title1: | MNAs |
| Area Total Km2: | 24.587 |
| Population Footnotes: | [1] |
| Population Total: | 465,807 |
| Population As Of: | 2024[2] |
| Population Density Km2: | auto |
| Timezone1: | Korea Standard Time |
| Utc Offset1: | +9 |
| Postal Code Type: | Postal code |
| Postal Code: | 05200 – 05499 |
| Area Code Type: | Area code(s) |
| Area Code: | +82-2-400~ |
| Website: | Gangdong District official website |
| Governing Body: | Gangdong-gu Council |
Gangdong District is one of the 25 gu that make up the city of Seoul. Gangdong, literally means "east of river".
Jungbu (literally "central part") Express Motorway starts in and passes through Sangil-dong, which is located in the east end of this district. In Amsa-dong, there is a pre-historic heritage site, which is about six thousand years old. On the site, you can find many potteries and houses. The pottery which has been found was made of ceramic and is circular and shaped into a point similar to corn.
Gangdong District is home to 25 elementary schools, 17 junior high schools and 12 senior high schools, including a specialized high school (Hanyoung Foreign Language High School), and a special education school (Jumong School).
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