Summerville, OR has a population of 111 and is the 26,652nd largest city in the United States. The population density is 429 per sq mi which is 982% higher than the Oregon average and 373% higher than the national average. The median age in Summerville is 42 which is approximately 8% higher than the Oregon average of 39. In Summerville, 86% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 51% of Summerville residents were born in Oregon, 49% were born out of state, 0% were born outside of the United States and 0% were foreign born.