Eugene, OR has a population of 161,649 and is the 156th largest city in the United States. The population density is 3,661 per sq mi which is 9146% higher than the Oregon average and 3941% higher than the national average. The median age in Eugene is 34 which is approximately 13% lower than the Oregon average of 39. In Eugene, 44% of the population over 15 years of age are married, 89% speak English and 6% speak Spanish. 42% of Eugene residents were born in Oregon, 49% were born out of state, 1% were born outside of the United States and 8% were foreign born.