Omao, HI has a population of 1,289 and is the 13,596th largest city in the United States. The population density is 1,017 per sq mi which is 698% higher than the Hawaii average and 1022% higher than the national average. The median age in Omao is 49 which is approximately 28% higher than the Hawaii average of 39. In Omao, 62% of the population over 15 years of age are married, 85% speak English and 1% speak Spanish. 52% of Omao residents were born in Hawaii, 36% were born out of state, 0% were born outside of the United States and 12% were foreign born.