Oklahoma inland flooding risk
Tulsa County has the highest inland flooding risk in Oklahoma, scoring 97.9 out of 100 — rated "Relatively High" by FEMA's National Risk Index. Recorded inland flooding events across Oklahoma have decreased 43% over the past five years compared to the prior five-year period.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Tulsa County | 97.9 | Relatively High | 124 |
| 2 | Oklahoma County | 97.6 | Relatively High | 115 |
| 3 | Cleveland County | 88.2 | Relatively Moderate | 81 |
| 4 | Delaware County | 86.5 | Relatively Moderate | 6 |
| 5 | Le Flore County | 84.3 | Relatively Moderate | 41 |
| 6 | Comanche County | 83.6 | Relatively Moderate | 54 |
| 7 | Rogers County | 81.4 | Relatively Moderate | 26 |
| 8 | Ottawa County | 78.2 | Relatively Moderate | 44 |
| 9 | Muskogee County | 78 | Relatively Moderate | 24 |
| 10 | Cherokee County | 77.5 | Relatively Moderate | 28 |
| 11 | McCurtain County | 75.9 | Relatively Moderate | 62 |
| 12 | Mayes County | 75.9 | Relatively Moderate | 16 |
| 13 | Canadian County | 75.7 | Relatively Moderate | 24 |
| 14 | Osage County | 75.1 | Relatively Moderate | 22 |
| 15 | Washington County | 74.2 | Relatively Moderate | 14 |
| 16 | Sequoyah County | 73.6 | Relatively Moderate | 27 |
| 17 | Creek County | 72.2 | Relatively Low | 11 |
| 18 | Wagoner County | 70.6 | Relatively Low | 16 |
| 19 | Kay County | 69.8 | Relatively Low | 19 |
| 20 | Payne County | 67.6 | Relatively Low | 16 |
| 21 | Pottawatomie County | 67.4 | Relatively Low | 21 |
| 22 | Pittsburg County | 67.1 | Relatively Low | 22 |
| 23 | Garfield County | 67 | Relatively Low | 24 |
| 24 | Okmulgee County | 66 | Relatively Low | 44 |
| 25 | Carter County | 63.4 | Relatively Low | 16 |
| 26 | Grady County | 62.7 | Relatively Low | 17 |
| 27 | McIntosh County | 59.8 | Relatively Low | 12 |
| 28 | Adair County | 59.5 | Relatively Low | 32 |
| 29 | Craig County | 55.1 | Relatively Low | 10 |
| 30 | Garvin County | 54.9 | Relatively Low | 29 |
| 31 | Caddo County | 54.5 | Relatively Low | 19 |
| 32 | Stephens County | 54.2 | Relatively Low | 28 |
| 33 | Bryan County | 54.1 | Relatively Low | 9 |
| 34 | McClain County | 53.3 | Relatively Low | 10 |
| 35 | Logan County | 50.7 | Relatively Low | 14 |
| 36 | Lincoln County | 50.4 | Relatively Low | 19 |
| 37 | Pontotoc County | 45.6 | Relatively Low | 33 |
| 38 | Kingfisher County | 40.7 | Relatively Low | 11 |
| 39 | Latimer County | 40.6 | Relatively Low | 4 |
| 40 | Marshall County | 38.8 | Relatively Low | 4 |
| 41 | Custer County | 38.7 | Relatively Low | 10 |
| 42 | Seminole County | 38.2 | Relatively Low | 10 |
| 43 | Woodward County | 36.8 | Relatively Low | 5 |
| 44 | Pushmataha County | 36.1 | Relatively Low | 4 |
| 45 | Pawnee County | 35.4 | Relatively Low | 15 |
| 46 | Beckham County | 31.8 | Very Low | 11 |
| 47 | Murray County | 31.5 | Very Low | 20 |
| 48 | Noble County | 31 | Very Low | 7 |
| 49 | Nowata County | 29 | Very Low | 10 |
| 50 | Choctaw County | 26.8 | Very Low | 4 |
| 51 | Jackson County | 25.1 | Very Low | 15 |
| 52 | Kiowa County | 22.9 | Very Low | 10 |
| 53 | Haskell County | 22.6 | Very Low | 4 |
| 54 | Alfalfa County | 22.4 | Very Low | 3 |
| 55 | Okfuskee County | 22.1 | Very Low | 9 |
| 56 | Atoka County | 20.5 | Very Low | 7 |
| 57 | Washita County | 19.8 | Very Low | 8 |
| 58 | Johnston County | 19.1 | Very Low | 39 |
| 59 | Hughes County | 17.5 | Very Low | 2 |
| 60 | Blaine County | 17.4 | Very Low | 3 |
| 61 | Love County | 14.4 | Very Low | 7 |
| 62 | Major County | 14.3 | Very Low | 5 |
| 63 | Jefferson County | 14.2 | Very Low | 6 |
| 64 | Grant County | 13.8 | Very Low | 8 |
| 65 | Woods County | 12.6 | Very Low | 2 |
| 66 | Coal County | 12.1 | Very Low | 12 |
| 67 | Texas County | 11.9 | Very Low | 8 |
| 68 | Roger Mills County | 10.4 | Very Low | 5 |
| 69 | Ellis County | 7 | Very Low | 1 |
| 70 | Harper County | 6.8 | Very Low | 1 |
| 71 | Tillman County | 6.7 | Very Low | 17 |
| 72 | Cotton County | 6.5 | Very Low | 2 |
| 73 | Greer County | 5.9 | Very Low | 7 |
| 74 | Dewey County | 5.7 | Very Low | 1 |
| 75 | Beaver County | 5.3 | Very Low | 9 |
| 76 | Harmon County | 3.8 | Very Low | 1 |
| 77 | Cimarron County | 2.9 | Very Low | 5 |
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 Oklahoma:
Frequently asked questions
What is the highest inland flooding risk county in Oklahoma?
Tulsa County, OK has the highest inland flooding risk in Oklahoma, with a FEMA National Risk Index score of 97.9 out of 100 (rated "Relatively High").
What causes inland flooding risk in Oklahoma?
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.