Oregon inland flooding risk
Lane County has the highest inland flooding risk in Oregon, scoring 97.2 out of 100 — rated "Relatively High" by FEMA's National Risk Index. Recorded inland flooding events across Oregon have decreased 23% over the past five years compared to the prior five-year period.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Lane County | 97.2 | Relatively High | 18 |
| 2 | Multnomah County | 95.5 | Relatively High | 4 |
| 3 | Douglas County | 95.2 | Relatively High | 8 |
| 4 | Washington County | 93.9 | Relatively High | 11 |
| 5 | Clackamas County | 93.7 | Relatively High | 6 |
| 6 | Jackson County | 93.1 | Relatively Moderate | 3 |
| 7 | Marion County | 90.5 | Relatively Moderate | 6 |
| 8 | Josephine County | 90.2 | Relatively Moderate | 2 |
| 9 | Deschutes County | 88.9 | Relatively Moderate | 2 |
| 10 | Lincoln County | 86.6 | Relatively Moderate | 7 |
| 11 | Linn County | 86.3 | Relatively Moderate | 3 |
| 12 | Coos County | 85.6 | Relatively Moderate | 34 |
| 13 | Umatilla County | 81.5 | Relatively Moderate | 9 |
| 14 | Klamath County | 78.5 | Relatively Moderate | 4 |
| 15 | Tillamook County | 76.3 | Relatively Moderate | 21 |
| 16 | Benton County | 74.8 | Relatively Moderate | 9 |
| 17 | Yamhill County | 74.1 | Relatively Moderate | 3 |
| 18 | Clatsop County | 72.1 | Relatively Low | 3 |
| 19 | Columbia County | 68.2 | Relatively Low | 5 |
| 20 | Polk County | 68.2 | Relatively Low | 11 |
| 21 | Curry County | 62.2 | Relatively Low | 12 |
| 22 | Wasco County | 59.2 | Relatively Low | 2 |
| 23 | Malheur County | 52 | Relatively Low | 6 |
| 24 | Grant County | 50.2 | Relatively Low | 5 |
| 25 | Wallowa County | 48.9 | Relatively Low | 5 |
| 26 | Baker County | 47.8 | Relatively Low | 2 |
| 27 | Crook County | 40.5 | Relatively Low | 3 |
| 28 | Morrow County | 40.1 | Relatively Low | 3 |
| 29 | Lake County | 37.6 | Relatively Low | 1 |
| 30 | Union County | 37.5 | Relatively Low | 3 |
| 31 | Jefferson County | 36.6 | Relatively Low | 1 |
| 32 | Hood River County | 30.4 | Very Low | 0 |
| 33 | Harney County | 28.5 | Very Low | 4 |
| 34 | Wheeler County | 12.3 | Very Low | 5 |
| 35 | Gilliam County | 7 | Very Low | 0 |
| 36 | Sherman County | 4.6 | Very Low | 0 |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Inland Flooding risk nationally:
Other hazard risks in Oregon:
Frequently asked questions
What is the highest inland flooding risk county in Oregon?
Lane County, OR has the highest inland flooding risk in Oregon, with a FEMA National Risk Index score of 97.2 out of 100 (rated "Relatively High").
What causes inland flooding risk in Oregon?
Inland flooding covers riverine and surface (pluvial) flooding — the most common and costly natural disaster type in the US. High scores appear across river floodplains in the Midwest, South, and Mid-Atlantic, where legacy development in flood-prone areas and aging stormwater infrastructure concentrate risk.