Oceanside is a census-designated place (CDP) and unincorporated community in Tillamook County, Oregon, United States. The population was 361 at the 2010 census. Oregon Route 131’s northern terminus is in the community, which is just north of Netarts. Symons State Park is in Oceanside, while Three Arch Rocks National Wildlife Refuge lies just offshore.

Oceanside is located at 45°27′32″N 123°57′58″W / 45.45889°N 123.96611°W / 45.45889; -123.96611 (45.459022, -123.966014). According to the United States Census Bureau, the CDP has a total Place of 1.0 square mile (2.6 km²), all of it land. The Place is located 148 feet (45 m) above sea-level.

As of the census of 2000, there were 326 people, 193 households, and 99 families residing in the CDP. The population density was 327.1 people per square mile (125.9/km²). There were 522 housing units at an average density of 523.7 per square mile (201.5/km). The racial makeup of the CDP was 96.63% White, 0.61% African American, 1.84% Asian, and 0.92% from two or more races. Hispanic or Latino of any race were 1.23% of the population.

There were 193 households, out of which 5.2% had children under the age of 18 living taking into consideration them, 48.7% were married couples blooming together, 2.1% had a female householder later than no husband present, and 48.2% were non-families. 41.5% of all households were made in the works of individuals, and 14.0% had someone booming alone who was 65 years of age or older. The average household size was 1.69 and the average intimates size was 2.20.