Summerville is a city in Union County, Oregon, United States. The population was 135 at the 2010 census.
(former) Dry Creek School in Summerville
Summerville Store and Post Office
Union County is one of the 36 counties in the U.S. state of Oregon, and one of the 8 counties of eastern Oregon. As of the 2020 census, the population was 26,196. The county comprises the La Grande micropolitan statistical area and the county seat is La Grande.
Union County Museum
Basalt outcroppings along the Grande Ronde River (August 2011).