From a total population of 21,334, Plainview has a median age of 30.7. The average age of males, in Plainview, is 28.4 while the average age of females is 32.8. When you compare this to median age of Texas, Plainview is 3.2 years younger.
The median income of individuals, in Plainview, is $17,875 while the average household income is $42,419. When comparing the median income of people living in Plainview to the rest of Texas, the average income in Plainview is $8,638 less.