| Official Name: | Massiaru |
| Settlement Type: | Village |
| Subdivision Type: | Country |
| Subdivision Name: |  Estonia |
| Subdivision Type1: | County |
| Subdivision Name1: | Pärnu County |
| Subdivision Type2: | Parish |
| Subdivision Name2: | Häädemeeste Parish |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
Massiaru is a village in Häädemeeste Parish, Pärnu County in southwestern Estonia.[1]