Paia, HI has a population of 2,548 and is the 9,740th largest city in the United States. The population density is 416 per sq mi which is 226% higher than the Hawaii average and 359% higher than the national average. The median age in Paia is 37 which is approximately 4% lower than the Hawaii average of 39. In Paia, 50% of the population over 15 years of age are married, 90% speak English and 1% speak Spanish. 56% of Paia residents were born in Hawaii, 33% were born out of state, 1% were born outside of the United States and 11% were foreign born.