| Official Name: | Illana, Spain |
| Pushpin Map: | Spain Province of Guadalajara#Spain Castilla-La Mancha#Spain |
| Subdivision Name3: | Illana |
| Leader Title: | Mayor |
| Leader Name: | Franciso Javier Pérez del Saz[1] |
| Leader Party: | People's Party |
| Leader Title2: | Deputy Mayor |
| Leader Name2: | Rafael Alonso Teruel[2] |
| Population As Of: | 2023 |
| Population Total: | 878[3] |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Coordinates: | 40.1853°N -2.9069°W |
Illana (pronounced as /es/) is a town and municipality in the province of Guadalajara, Spain, part of the autonomous community of Castile–La Mancha. It belongs to the natural region of La Alcarria.