Athena is a city in Umatilla County, Oregon, United States. Take a look below for 15 fun and amazing facts about Athena, Oregon, United States. 1. The population was 1,126 at the 2010 census. 2. It is part of the Pendleton–Hermiston Micropolitan Statistical Area. 3. Athena, about halfway between Pendleton, Oregon, and Walla Walla, Washington,…