Guadarrama is a town and municipality in the Cuenca del Guadarrama comarca, in the Community of Madrid, Spain. Its population is 17,063 according to the Continuous Register of 2023; the population swells to approximately 60,000 in summer. In the 2023 Spanish general election, for the Congress of Spain the residents voted 41.29% for the People's Party, 24.54% for the Spanish Socialist Workers' Party, and 19.45% voted for Vox. Its name comes from Arabic Wadi-l-ramla river.