| Official Name: | Mouyondzi |
| Pushpin Map: | Republic of the Congo |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in the Republic of the Congo |
| Subdivision Type: | Country |
| Subdivision Name: | Republic of the Congo |
| Subdivision Name1: | Bouenza |
| Subdivision Type2: | District |
| Subdivision Name2: | Mouyondzi |
| Unit Pref: | Imperial |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Coordinates: | -3.9956°N 13.9219°W |
Mouyondzi (can also be written as Muyonzi or Muyondzi) is a town and the seat of Mouyondzi District in the Bouenza Department of Congo-Brazzaville. Mouyondzi's population mostly consists of Beembe.
The town is served by Mouyondzi Airport.