| Official Name: | Koidma |
| Settlement Type: | Village |
| Pushpin Map: | Estonia |
| Subdivision Type: | Country |
| Subdivision Name: |  Estonia |
| Subdivision Type1: | County |
| Subdivision Name1: | Hiiu County |
| Subdivision Type2: | Parish |
| Subdivision Name2: | Hiiumaa Parish |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
| Coordinates: | 58.9833°N 59°W |
Koidma is a village in Hiiumaa Parish, Hiiu County in northwestern Estonia.[1] It has five inhabitants as per 2011 census. Koidma is 8 km away from the capital Kärdla.