Oakley, ID has a population of 1,000 and is the 15,159th largest city in the United States. The population density is 216 per sq mi which is 1034% higher than the Idaho average and 139% higher than the national average. The median age in Oakley is 29 which is approximately 20% lower than the Idaho average of 36. In Oakley, 72% of the population over 15 years of age are married, 85% speak English and 15% speak Spanish. 57% of Oakley residents were born in Idaho, 33% were born out of state, 1% were born outside of the United States and 9% were foreign born.