Sierra de la Demanda is a mountain sub-range situated in the northern Iberian Peninsula.

The Sierra de la Demanda area provides the habitat for Lissotriton helveticus punctillatus (Schmidtler 1970), a subspecies of the palmate newt.

[1] The Sierra de la Demanda is part of the western section of the larger Sistema Ibérico.

The sub-range runs through the eastern province of Burgos and western La Rioja, bordering on the Meseta Central in Spain.

Valdezcaray ski resort is located in the Sierra de la Demanda.