In 1081, Alfonso VI began the reconquest of the Jarama basin, expelling the Muslims and repopulating the area with Christians from the South.

The cadastral data of this time speak of a population of "290 neighbors living in 282 houses", increasing the number of inhabitants to 1,263 in just a few years.

In the 20th century, when the Spanish Civil War began, Algete remained on the Republican side.

In the decade of the sixties, development arrives little by little to the municipality: the first industrial areas are born, water is channeled, highways are built and public lighting is reformed.

Algete is located just 20 km northeast of the urban developments of Sanchinarro and Las Tablas, in Madrid.

It borders the municipalities of Fuente el Saz del Jarama, San Sebastián de los Reyes, Valdeolmos-Alalpardo, Cobeña, Daganzo de Arriba, El Molar, San Agustín del Guadalix and Colmenar Viejo.