Oysterville is located in Willapa Bay on the Long Beach Peninsula, about 28 miles (45 km) north-northwest of Astoria and 17 miles (27 km) southwest of Raymond, Washington. The Long Beach Peninsula is a sand spit that separates Willapa Bay from the Pacific Ocean and is known for its continuous sandy beaches on the Pacific Ocean side. The peninsula is 22 miles (35 km) long and claimed to be the longest beach in the contiguous United States.

Willapa Bay is the second-largest estuary on the U.S. Pacific coast with an area over 260 square miles (67,340 ha). The bay is known for its biodiversity and much of it has been set aside as part of the Willapa National Wildlife Refuge that includes over 15,000 acres (6070 ha) of tidelands, temperate rainforest, ocean beaches, and small streams. It also includes several rare remnants of the old-growth coastal cedar forest.

A local oyster and seafood processing industry is based in Willapa Bay where approximately 9% of all oysters in the U.S. are grown. Oyster farming is aquaculture practiced since the 1st century BC in Europe but is now being threatened by ocean acidification. The ocean absorbs carbon dioxide from the atmosphere and becomes more acidic and corrosive, and this affects oysters (and other shellfish) because the young larvae cannot produce calcium carbonate fast enough to grow their shells. Read more here and here. Explore more of Oysterville and Willapa Bay here: