| Koin | |
| Settlement Type: | Sub-prefecture and town |
| Pushpin Map: | Guinea |
| Pushpin Label Position: | above |
| Pushpin Mapsize: | 250 |
| Pushpin Map Caption: | Location in Guinea |
| Subdivision Type: | Country |
| Subdivision Name: |  Guinea |
| Subdivision Type1: | Region |
| Subdivision Name1: | Labé Region |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Tougué Prefecture |
| Unit Pref: | metric |
| Area Total Km2: | 0.964 |
| Area Land Km2: | 0.964 |
| Population Blank1 Title: | Ethnicities |
| Utc Offset: | +0 |
| Coordinates: | 11.2167°N -60°W |
Koin is a town and sub-prefecture in the Tougué Prefecture in the Labé Region of northern-central Guinea.[1] The town has a total area of about 0,964 square kilometers or 0,372 square miles. Koin was one of the nine Diiwe (provinces) of the theocratic Kingdom of Fuuta Jaloo.