Se analizan las relaciones existentes entre las características socio-económicas de los municipios valencianos y su comportamiento en las elecciones legislativas de 1979. Comportamiento electoral y características socio-económicas se sintetizan en un número reducido de factores y componentes interpretables, mediante las técnicas de análisis factorial de correspondencias y análisis de componentes principales. Posteriormente se cuantifican mediante la técnica de regresión ponderada las relaciones existentes entre factores electorales y componentes socio-económicas.The existing relations between the social and economical characteristics of Valencia's towns and their electoral behaviour in the 1979 legislative election, are ana1ysed. Both electoral behaviour and social and economical characteristics are synthesised in a reduced number of factors and interpretable components, through techniques of correspondences' factorial analysis and principal components analysis. Later the relations existing between electoral factors and social and economical components are quantified by means of the technique of weighted regression.