The study had among its objectives (1) the determination of rural-urban differences in the use of Spanish and English by household heads and Spanish American children of these households, and (2) the relationships between language used by Spanish American household heads and selected socioeconomic factors. It was found that use of Spanish increased (1) with age, (2) slightly with rurality, (3) significantly among household heads born in Mexico (as opposed to Texas), (4) with fewer years of school completed, (5) with lower income, and (6) with lower occupation level. The study concluded that statistically significant relationships existed between language usage and all socioeconomic factors studied. (DA)