Île-de-Sein (Île-de-Sein)
- commune in Finistère, France
- Country:
- Postal Code: 29990
- Coordinates: 48° 2' 10" N, 4° 51' 4" E
- GPS tracks (wikiloc): [Link]
- Area: 0.6 sq km
- Population: 237
- Web site: http://www.mairie-iledesein.com
- Wikidata storage: Wikidata: Q13416868
- Wikipedia Commons Category: [Link]
- SIREN number: [212900831]
- BnF ID: [152544369]
- OSM relation ID: [278723]
- INSEE municipality code: 29083