Astoria is a port city and the seat of Clatsop County, Oregon, United States. Founded in 1811, Astoria is the oldest city in the state and was the first permanent American settlement west of the Rocky Mountains. The county is the northwest corner of Oregon, and Astoria is located on the south shore of the Columbia River, where the river flows into the Pacific Ocean. The city is named for John Jacob Astor, an investor and entrepreneur from New York City, whose American Fur Company founded Fort Astoria at the site and established a monopoly in the fur trade in the early 19th century. Astoria was incorporated by the Oregon Legislative Assembly on October 20, 1856. The city is served by the deepwater Port of Astoria. Transportation includes the Astoria Regional Airport. U.S. Route 30 and U.S. Route 101 are the main highways, and the Astoria–Megler Bridge connects to neighboring Washington across the river. The population was 10,181 at the 2020 census. History Prehistoric settlements During archeological excavations in Astoria and Fort Clatsop in 2012, trading items from American settlers with Native Americans were found, including Austrian glass beads and falconry bells. The present area of Astoria belonged to a large, prehistoric Native American trade system of the Columbia Plateau. 19th century The Lewis and Clark Expedition spent the winter of 1805–1806 at Fort Clatsop, a small log structure southwest of modern-day Astoria. The expedition had hoped a ship would come by that could take them back east, but instead, they endured a torturous winter of rain and cold. They later returned overland and by internal rivers, the way they had traveled west. Today, the fort has been recreated and is part of Lewis and Clark National Historical Park. In 1811, British explorer David Thompson, the first person known to have navigated the entire length of the Columbia River, reached the partially constructed Fort Astoria near the mouth of the river. He arrived two months after the Pacific Fur Company's ship, the Tonquin. The fort constructed by the Tonquin party established Astoria as a U.S., rather than a British, settlement and became a vital post for American exploration of the continent. It was later used as an American claim in the Oregon boundary dispute with European nations. The Pacific Fur Company, a subsidiary of John Jacob Astor's American Fur Company, was created to begin fur trading in the Oregon Country.