| Merijärvi | |
| Official Name: | Finnish: Merijärven kunta Swedish: Merijärvi kommun |
| Settlement Type: | Municipality |
| Coordinates: | 64.2967°N 50.8°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Finland |
| Subdivision Type1: | Region |
| Subdivision Name1: | North Ostrobothnia |
| Subdivision Type2: | Sub-region |
| Subdivision Name2: | Ylivieska |
| Leader Title: | Municipal manager |
| Leader Name: | Kari Jokela |
| Established Title: | Charter |
| Established Date: | 1866 |
| Timezone: | EET |
| Utc Offset: | +02:00 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +03:00 |
| Website: | www.merijarvi.fi |
Merijärvi is a municipality of Finland.
It is located in the province of Oulu and is part of the Northern Ostrobothnia region. The municipality has a population of and covers an area of NaNMerijärvi}} of which NaNMerijärvi}} is water. The population density is NaNMerijärvi.
The municipality is unilingually Finnish.