Plainview, TX has a population of 21,365 and is the 2,035th largest city in the United States. The population density is 1,549 per sq mi which is 1498% higher than the Texas average and 1610% higher than the national average. The median age in Plainview is 32 which is approximately 6% lower than the Texas average of 34. In Plainview, 56% of the population over 15 years of age are married, 62% speak English and 37% speak Spanish. 77% of Plainview residents were born in Texas, 12% were born out of state, 0% were born outside of the United States and 10% were foreign born.