| Ryonggang County | |
| Native Name: | Korean: 룡강군 |
| Settlement Type: | County |
| Translit Lang1 Type: | Chosŏn'gŭl |
| Translit Lang1 Info: | Korean: 룡강군 |
| Translit Lang1: | Korean |
| Translit Lang1 Type1: | Hancha |
| Translit Lang1 Info1: | Korean: {{linktext|龍|岡|郡 |
| Translit Lang1 Info2: | Ryonggang-gun |
| Translit Lang1 Info3: | Ryonggang-gun |
| Mapsize: | 300px |
| Coordinates: | 38.8572°N 125.4219°W |
| Subdivision Type: | Country |
| Subdivision Name: | North Korea |
| Subdivision Type1: | Province |
| Subdivision Name1: | South P'yongan |
| Subdivision Type2: | Special City |
| Subdivision Name2: | Namp'o-tŭkpyŏlsi |
| Area Total Km2: | 1200 |
| Population As Of: | 2008 |
| Population Total: | 58,930 |
| Population Density Km2: | auto |
| Parts Type: | Administrative divisions |
| Parts: | 1 ŭp, 10 ri |
Ryonggang County is a county in South P'yŏngan province, North Korea. It is administered as a part of Namp'o Special City. It is famous for its local apples.
Ryonggang-gun is divided into one town (ŭp) and 10 villages (ri):
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Ryonggang County is served by the P'yŏngnam and Ryonggang lines of the Korean State Railway.