Nehalem Bank is a bar, off the coast of Oregon, United States.

[4] It is located off Tillamook Head, hence is off Clatsop County, and is barely south of the mouth of the Columbia River and Astoria Canyon.

There are rocky remnants of former seacliffs which are bored with intertidal pholad clam holes, testifying to what the level of the sea once was.

These sites have microbial communities, also known as bacterial mats, in patches close to the sources of methane bubbles.

[11][12] In the forearc of the Cascadia Subduction Zone, this fault underlies the continental shelf.