| Official Name: | Lemoiz |
| Pushpin Map: | Spain Basque Country |
| Pushpin Map Caption: | Location of Lemoiz within the Basque Country |
| Coordinates: | 43.4114°N -2.9022°W |
| Subdivision Type: | Country |
| Subdivision Name: | Spain |
| Subdivision Type1: | Autonomous community |
| Subdivision Name1: | Biscay |
| Subdivision Type2: | Province |
| Area Total Km2: | 13.40 |
| Elevation M: | 89 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Website: | www.lemoiz.net |
Lemoiz (Spanish; Castilian: Lemóniz) is a town and municipality located in the province of Biscay, in the autonomous community of Basque Country, northern Spain. It has a population of about 1243.
It was chosen as the site of the Lemoniz Nuclear Power Plant, but the construction was left unfinished after ecologist opposition and ETA attacks.