The Clatsop are an ethnic group native to the US state of Oregon.
Clatsop may also refer to:
Geography Clatsop County, Oregon, a county in northwestern Oregon Clatsop Butte, an upland butte in Portland, Oregon Clatsop Mission, a Methodist station Clatsop Plains, an area of wetlands and sand dunes in Oregon Clatsop Spit, a large sand spit off the coast of Oregon Clatsop State Forest, an Oregon state forest Fort Clatsop, an encampment of the Lewis and Clark expedition in modern-day Oregon
Other uses Clatsop Community College, a community college in Clatsop County