Beaver is an unincorporated community in Tillamook County, Oregon, United States, along U.S. Route 101 and the Nestucca River, about 12 miles (19 km) south of Tillamook. For statistical purposes, the United States Census Bureau has defined Beaver as a census-designated place (CDP). The census definition of the area may not precisely correspond to local understanding of the area with the same name. The population of the CDP was 122 at the 2010 census.

Tillamook County is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the population was 27,390. The county seat is Tillamook. The county is named for the Tillamook or Killamook people, a Native American tribe who were living in the area in the early 19th century at the time of European American settlement. The county is located within Northwest Oregon.