Wasco, OR has a population of 381 and is the 21,131st largest city in the United States. The population density is 376 per sq mi which is 850% higher than the Oregon average and 315% higher than the national average. The median age in Wasco is 56 which is approximately 42% higher than the Oregon average of 39. In Wasco, 59% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 57% of Wasco residents were born in Oregon, 41% were born out of state, 2% were born outside of the United States and 1% were foreign born.