Oakland, IL has a population of 898 and is the 15,813th largest city in the United States. The population density is 1,087 per sq mi which is 389% higher than the Illinois average and 1100% higher than the national average. The median age in Oakland is 43 which is approximately 16% higher than the Illinois average of 37. In Oakland, 67% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 81% of Oakland residents were born in Illinois, 19% were born out of state, 0% were born outside of the United States and 0% were foreign born.