Poipu, HI has a population of 1,057 and is the 14,805th largest city in the United States. The population density is 412 per sq mi which is 223% higher than the Hawaii average and 354% higher than the national average. The median age in Poipu is 59 which is approximately 54% higher than the Hawaii average of 39. In Poipu, 64% of the population over 15 years of age are married, 89% speak English and 1% speak Spanish. 28% of Poipu residents were born in Hawaii, 60% were born out of state, 3% were born outside of the United States and 9% were foreign born.