Cannon Beach is a city in Clatsop County, Oregon, United States. Its population was 1,690 at the 2010 census. It is a popular coastal Oreg…Cannon Beach is a city in Clatsop County, Oregon, United States. Its population was 1,690 at the 2010 census. It is a popular coastal Oregon tourist destination, famous for Haystack Rock, a 235 ft sea stack that juts out along the coast. In 2013, National Geographic listed it as "one of the world's 100 most beautiful places."