what county is rockaway beach in
Rockaway Beach, OR. Online Offers. Rockaway Beach is a city in Tillamook County, Oregon, United States. The population was 1,267 at the 2000 census. The community of Rockaway was established as a seaside resort in 1909 by the Rockaway Beach Company. It was named after Rockaway Beach on Long Island in New York. Rockway post office was established in 1911.