Alcalá de Henares is a Spanish city in the Community of Madrid. Straddling the Henares River, it is located 31 kilometres to the northeast of the center of Madrid. As of 2018, it has a population of 193,751, making it the region's third-most populated municipality.

The Community of Madrid is one of the seventeen autonomous communities of Spain. It is located in the centre of the Iberian Peninsula, and of the Central Plateau. Its capital and largest municipality is the City of Madrid, which is also the capital of the country. The Community of Madrid is bounded to the south and east by Castilla–La Mancha and to the north and west by Castile and León. It was formally created in 1983, in order to address the particular status of the City of Madrid as the national capital city and in urban hierarchy. Its limits are those of the province of Madrid, which was until then conventionally included in the historical region of New Castile.