Los Montesinos is a municipality located in the south of the province of Alicante in the comarca of Vega Baja del Segura, Valencian Commu…Los Montesinos is a municipality located in the south of the province of Alicante in the comarca of Vega Baja del Segura, Valencian Community, Spain. It has a population of 5,682 inhabitants. It is a Spanish-speaking municipality, in which Spanish has legally recognized linguistic predominance.