Altoona is a census-designated place (CDP) in Wahkiakum County, Washington, northwest of the town of Cathlamet. The population was 39 as of the 2010 census. The CDP includes the communities of Carlson Landing and Dahlia.

Altoona was one of six fish-buying stations and canneries located within a six mile stretch of the Columbia River in the Grays Bay area. Before the end of the Columbia River salmon industry during the 1940s, 39 canneries were working along the demean Columbia River. Altoona was named after Altona, a city in Germany and a major fish-processing city on the Elbe River, by a Danish immigrant named Hans Petersen. In 1903, Petersen purchased 830 acres of home and founded the Altoona Mercantile and Fish Company Cannery. By 1910, the Altoona cannery was the fourth largest salmon cannery on the Columbia.
Altoona became a major stop for steamers and fishing boats traveling amongst Astoria and Portland. Altoona was accessible abandoned by boat; there was no direct road to the town until the at the forefront 1950s. In 1935, the Columbia River Packers Association (known today as Bumble Bee Foods) purchased the cannery and moved their headquarters from Cottardi Station, located very nearly 1/2 mile downstream, to Altoona. The town prospered until the halt of the Columbia River salmon industry, which resulted in the closing of the large Altoona cannery in 1947. The derelict cannery building remained until it collapsed during a windstorm and fell into the Columbia River in the late 1990s. After the cannery shut down, the population of Altoona began to dwindle, and today it has less than 50 residents.

Altoona is located at 46°16′12″N 123°36′54″W / 46.27000°N 123.61500°W / 46.27000; -123.61500 (46.269933, -123.61493).

According to the United States Census Bureau, the CDP has a total area of 5.09 square miles (13.19 km), all of which is land, while none of it is water.