Oregon City, OR has a population of 35,057 and is the 1,202nd largest city in the United States. The population density is 3,636 per sq mi which is 9081% higher than the Oregon average and 3913% higher than the national average. The median age in Oregon City is 38 which is approximately 4% lower than the Oregon average of 39. In Oregon City, 56% of the population over 15 years of age are married, 93% speak English and 5% speak Spanish. 60% of Oregon City residents were born in Oregon, 34% were born out of state, 1% were born outside of the United States and 5% were foreign born.