Inn is a district of the canton of Graubünden, Switzerland. It has an area of 1,196.77 km² and a population of 9,371 people (as of December 2004).
It contains 4 Kreise (sub-districts) and 18 municipalities:
| Ramosch (Remüs) sub-district |
| Municipality | Population (31 Dec 2004) | Area (km²) |
| Ramosch | 495 | 84.08 |
| Samnaun | 819 | 56.18 |
| Tschlin | 424 | 75.08 |
| Suot Tasna (Untertasna) sub-district |
| Municipality | Population (31 Dec 2004) | Area (km²) |
| Ftan | 497 | 43.10 |
| Scuol | 2,190 | 144.14 |
| Sent | 860 | 111.74 |
| Sur Tasna (Obtasna) sub-district |
| Municipality | Population (31 Dec 2004) | Area (km²) |
| Ardez | 432 | 61.43 |
| Guarda | 177 | 31.45 |
| Lavin | 194 | 46.18 |
| Susch | 214 | 93.95 |
| Tarasp | 308 | 46.90 |
| Zernez | 1,035 | 203.91 |
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