Oatfield, OR has a population of 13,592 and is the 3,070th largest city in the United States. The population density is 4,002 per sq mi which is 10006% higher than the Oregon average and 4317% higher than the national average. The median age in Oatfield is 47 which is approximately 20% higher than the Oregon average of 39. In Oatfield, 64% of the population over 15 years of age are married, 94% speak English and 3% speak Spanish. 58% of Oatfield residents were born in Oregon, 36% were born out of state, 0% were born outside of the United States and 6% were foreign born.