| Official Name: | Muang Kasi |
| Settlement Type: | Town |
| Pushpin Map: | Laos |
| Subdivision Type: | Country |
| Subdivision Type2: | Province |
| Subdivision Name2: | Vientiane Province |
| Subdivision Type3: | District |
| Timezone: | Laos Standard Time |
| Utc Offset: | +7 |
| Coordinates: | 19.2333°N 117°W |
Muang Kasi is a river town in Vientiane Province, Laos. It is located to the north of Ban Thieng along Route 13.[1] The Pathet Lao were active in Muang Kasi.[2]