| Nakai district | |
| Native Name Lang: | lo |
| Settlement Type: | District |
| Mapsize: | 300px |
| Mapsize1: | 150px |
| Subdivision Type: | Country |
| Subdivision Name: | Laos |
| Subdivision Type1: | Province |
| Subdivision Name1: | Khammouane |
| Unit Pref: | Imperial |
| Timezone: | ICT |
| Utc Offset: | +7 |
Nakai is a district (muang) of Khammouane province in mid-Laos.[1] Nakai-Nam Theun National Park is in Nakai District; its headquarters is in Oudomsouk Village.