Plainview, NY has a population of 26,087 and is the 1,653rd largest city in the United States. The population density is 4,557 per sq mi which is 1170% higher than the New York average and 4930% higher than the national average. The median age in Plainview is 44 which is approximately 16% higher than the New York average of 38. In Plainview, 74% of the population over 15 years of age are married, 79% speak English and 3% speak Spanish. 76% of Plainview residents were born in New York, 5% were born out of state, 1% were born outside of the United States and 18% were foreign born.