Plainview, CA has a population of 906 and is the 15,746th largest city in the United States. The population density is 2,931 per sq mi which is 1161% higher than the California average and 3135% higher than the national average. The median age in Plainview is 24 which is approximately 35% lower than the California average of 36. In Plainview, 43% of the population over 15 years of age are married, 6% speak English and 94% speak Spanish. 63% of Plainview residents were born in California, 2% were born out of state, 0% were born outside of the United States and 35% were foreign born.