Hongseong County
| Hongseong 홍성군 | |
|---|---|
| Korean transcription(s) | |
| • Hangul | 홍성군 | 
| • Hanja | 洪城郡 | 
| • Revised Romanization | Hongseong-gun | 
| • McCune-Reischauer | Hongsŏng-gun | 
| Location in South Korea | |
| Coordinates: 36°35′58″N 126°39′46″E / 36.5994°N 126.6628°E | |
| Country | South Korea | 
| Region | Hoseo | 
| Administrative divisions | 3 eup, 8 myeon | 
| Government | |
| • mayor | Lee Yong-log (이용록) | 
| Area | |
|  • Total | 443.5 km2 (171.2 sq mi) | 
| Population  (September 2024) | |
|  • Total | 98,866 | 
| • Density | 201.1/km2 (521/sq mi) | 
| • Dialect | Chungcheong | 
| Time zone | UTC+9 (Korea Standard Time) | 
| Area code | +82-41 | 
Hongseong County (Korean: 홍성군; RR: Hongseong-gun) is a county in South Korea, and the capital of South Chungcheong Province. The current governor is Lee Yong-log. The original name of the city is Hongju.