Coos River
river in Oregon, United States
The Coos River flows for about 5 miles (8.0 km) into Coos Bay along the Pacific coast of southwest Oregon in the United States. Formed by the confluence of its major tributaries, the South Fork Coos River and the Millicoma River, it drains an important timber-producing region of the Southern Oregon Coast Range. The course of the main stem and the major tributaries is generally westward from the coastal forests to the eastern end of Coos Bay near the city of Coos Bay.
The river is the largest tributary of Coos Bay, which at about 10,000 acres (4,000 ha) is the largest estuary that lies entirely within Oregon. The river enters the bay about 15 miles (24 km) from where the bay—curving east, north, and west of the cities of Coos Bay and North Bend and passing by the communities of Barview and Charleston—meets the ocean. About 30 other tributaries also enter the bay directly.
Most of the Coos River watershed of 730 square miles (1,900 km2) is in Coos County, but 147 square miles (380 km2) are in eastern Douglas County. Commercial forests cover about 85 percent of the basin.
The river supports populations of chinook and coho salmon, Pacific lamprey, western brook lamprey, shad, steelhead, and coastal cutthroat trout. Since public river-bank access is limited, fishing is often done by boat.
The public source identifies “Coos River” as river in Oregon, United States. This brief keeps that definition visible, then builds a research path around Coos, River and river.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Coos River”, the useful work is to connect “river in Oregon, United States” to the records capable of establishing context and consequence.
Maps, plans, fabric surveys and administrative records can establish how the site’s name, extent and function changed over time. The source revision retrieved here is dated Aug 4, 2026. The linked authority identifier is Q5168069. Authority coordinates are 43.363, -124.174. None of the 2 selected statements returned an explicit reference.
Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
- Historic place names
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Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “Coos River”, its source revision and the description used here.
- Expand the search: follow Coos River primary sources, Coos River archive and Coos research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
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This entry incorporates text from “Coos River” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.