Alcocer 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 central part of the country.
According to the 2004 census carried out by Spain's National Statistics Institute (INE), the municipality had a population of 313 inhabitants. This figure reflects the modest size typical of many villages in the sparsely populated Guadalajara province.