Montealegre del Castillo is a municipality in the province of Albacete, within the autonomous community of Castile-La Mancha, Spain. It is located in the southeastern part of the country, in a region characterised by a continental Mediterranean climate and a landscape of plains and low hills.
The municipality had a population of 2,040 as of 2023. Like many small towns in inland Spain, it is a rural community whose economy and daily life are tied to the surrounding agricultural land.
Its position within the Albacete province places it among the numerous small municipalities that make up this sparsely populated part of Castile-La Mancha.