| Official Name: | El Casar |
| Pushpin Map: | Spain#Spain Castilla-La Mancha#Spain Province of Guadalajara |
| Subdivision Name: | Spain |
| Area Total Km2: | 51.84 |
| Elevation M: | 833 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
El Casar (pronounced as /es/) is a municipality located in the province of Guadalajara, Castile-La Mancha, Spain.
Located in the border with the Community of Madrid, in the route of the N-320 road, it lies at 833 metres above sea level.[1] The municipality covers an area of 51.84 km2.[2]
it has a population of 11,812. El Casar is one of the municipalities in the province that experienced a great population increase in the late 20th century,[3] in parallel to a huge increase in the urbanised area, through low-density residential developments, initially intended mainly for second homes.[4] The population has roughly multiplied tenfold during the 1981–2011 period.[5]