| Official Name: | Koidu |
| Settlement Type: | Village |
| Subdivision Type: | Country |
| Subdivision Name: |  Estonia |
| Subdivision Type1: | County |
| Subdivision Name1: | Saare County |
| Subdivision Type2: | Parish |
| Subdivision Name2: | Lääne-Saare Parish |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
Koidu was a village in Lääne-Saare Parish, Saare County in western Estonia.
During the administrative reform in 2017, the village was unified (along with several other villages) with Randvere village, which was thereafter renamed to Suur-Randvere.