Necanicum River
| Necanicum River | |
|---|---|
The river as it flows through Seaside near its outlet to the Pacific Ocean | |
| Location | |
| Country | United States |
| State | Oregon |
| County | Clatsop |
| Physical characteristics | |
| Source | Northern Oregon Coast Range |
| • location | Humbug Mountain, Clatsop County, Oregon |
| • coordinates | 45°55′37″N 123°42′30″W / 45.92694°N 123.70833°W |
| • elevation | 1,847 ft (563 m) |
| Mouth | Pacific Ocean |
• location | At Seaside, Clatsop County, Oregon |
• coordinates | 46°0′41″N 123°55′39″W / 46.01139°N 123.92750°W |
• elevation | 7 ft (2.1 m) |
| Length | 21 mi (34 km) |
| Basin size | 83.7 sq mi (217 km2) |
The Necanicum River is a river on the Pacific coast of northwest Oregon in the United States, approximately 21 miles (34 km) long. It drains a timber-producing area of the Northern Oregon Coast Range northwest of Portland. It forms the first estuary south of the mouth of the Columbia River along the Oregon Coast, reaching the Pacific Ocean at Seaside in Clatsop County.