The term CITY ON THE COLUMBIA RIVER can be solved by the seven-letter word ASTORIA. Astoria is a city located in the northwestern corner of Oregon, United States, at the mouth of the Columbia River. It is the oldest American settlement west of the Rocky Mountains and the first permanent U.S. settlement on the Pacific coast. Astoria was founded in 1811 by John Jacob Astor's Pacific Fur Company and named after him. It is now a popular tourist destination due to its rich history and stunning views of the Columbia River.