Onaway, ID has a population of 172 and is the 25,106th largest city in the United States. The population density is 1,149 per sq mi which is 5921% higher than the Idaho average and 1168% higher than the national average. The median age in Onaway is 46 which is approximately 29% higher than the Idaho average of 36. In Onaway, 82% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 49% of Onaway residents were born in Idaho, 50% were born out of state, 0% were born outside of the United States and 1% were foreign born.