Astoria is the seat of Clatsop County, Oregon, United States. Situated near the mouth of the Columbia River, the city was named after the American investor John Jacob Astor. His American Fur Company founded Fort Astoria at the site in 1811. Astoria was incorporated by the Oregon Legislative Assembly on October 20, 1876. Located on the south shore of the Columbia, the city is served by the Port of Astoria with a deep-water port. Transportation includes the Astoria Regional Airport with U.S. Route 30 and U.S. Route 101 as the main highways, and the 4.2-mile (6.8 km) Astoria – Megler Bridge connecting to neighboring Washington across the river. The population was 9,477 at the 2010 census.