Oakland, IA has a population of 1,544 and is the 12,506th largest city in the United States. The population density is 1,085 per sq mi which is 1886% higher than the Iowa average and 1097% higher than the national average. The median age in Oakland is 38 which is approximately 1% lower than the Iowa average of 38. In Oakland, 62% of the population over 15 years of age are married, 88% speak English and 8% speak Spanish. 55% of Oakland residents were born in Iowa, 37% were born out of state, 0% were born outside of the United States and 8% were foreign born.