Argecilla is a municipality in the province of Guadalajara, within the autonomous community of Castile-La Mancha, Spain. It is a small rural settlement in the Spanish interior, located in the region to the northeast of Madrid that makes up the province of Guadalajara.
The municipality is sparsely populated. According to the 2004 census carried out by the Instituto Nacional de Estadística (INE), Argecilla had a population of 100 inhabitants, reflecting the low population density typical of many of the smaller villages in this part of Castile-La Mancha.
As a municipality, Argecilla forms part of the local administrative structure of the province of Guadalajara, one of the five provinces that make up the Castile-La Mancha region. Its recorded population of roughly one hundred residents places it among the smallest municipal units in the area.