Riverine Flood Risk in Oklahoma
All Oklahoma counties ranked by FEMA National Risk Index riverine flood score
Riverine Flood risk — rivers and streams overflowing their banks after heavy rain or snowmelt — is rated for 77 of 77 Oklahoma counties in FEMA's National Risk Index. Tulsa County carries the state's highest riverine flood score at 97.9, with $138M in expected annual riverine flood losses.
2 Oklahoma counties are rated High or Very High for riverine flood, and expected annual losses from riverine flood total roughly $738M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Riverine Flood
| # | County | Riverine Flood Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Tulsa County | High | 4.75 / yr | $138M | |
| 2 | Oklahoma County | High | 3.07 / yr | $128M | |
| 3 | Cleveland County | Medium | 1.64 / yr | $36M | |
| 4 | Delaware County | Medium | 1.39 / yr | $17M | |
| 5 | Le Flore County | Medium | 4.07 / yr | $16M | |
| 6 | Comanche County | Medium | 2.00 / yr | $20M | |
| 7 | Rogers County | Medium | 1.79 / yr | $21M | |
| 8 | Ottawa County | Medium | 4.39 / yr | $12M | |
| 9 | Muskogee County | Medium | 2.68 / yr | $13M | |
| 10 | Cherokee County | Medium | 3.46 / yr | $14M | |
| 11 | Mayes County | Medium | 1.71 / yr | $12M | |
| 12 | McCurtain County | Medium | 2.14 / yr | $10M | |
| 13 | Canadian County | Medium | 1.36 / yr | $24M | |
| 14 | Osage County | Medium | 2.07 / yr | $12M | |
| 15 | Washington County | Medium | 1.25 / yr | $14M | |
| 16 | Sequoyah County | Medium | 1.96 / yr | $9M | |
| 17 | Creek County | Low | 2.07 / yr | $13M | |
| 18 | Wagoner County | Low | 1.96 / yr | $14M | |
| 19 | Kay County | Low | 2.11 / yr | $10M | |
| 20 | Payne County | Low | 0.93 / yr | $12M | |
| 21 | Pottawatomie County | Low | 1.11 / yr | $9M | |
| 22 | Pittsburg County | Low | 2.25 / yr | $8M | |
| 23 | Garfield County | Low | 1.00 / yr | $11M | |
| 24 | Okmulgee County | Low | 2.96 / yr | $8M | |
| 25 | Carter County | Low | 0.68 / yr | $8M | |
| 26 | Grady County | Low | 0.96 / yr | $10M | |
| 27 | McIntosh County | Low | 1.46 / yr | $5M | |
| 28 | Adair County | Low | 2.54 / yr | $6M | |
| 29 | Craig County | Low | 1.25 / yr | $5M | |
| 30 | Garvin County | Low | 0.79 / yr | $7M | |
| 31 | Caddo County | Low | 1.54 / yr | $6M | |
| 32 | Stephens County | Low | 1.39 / yr | $7M | |
| 33 | Bryan County | Low | 0.82 / yr | $5M | |
| 34 | McClain County | Low | 0.82 / yr | $8M | |
| 35 | Logan County | Low | 0.64 / yr | $7M | |
| 36 | Lincoln County | Low | 0.93 / yr | $5M | |
| 37 | Pontotoc County | Low | 0.82 / yr | $5M | |
| 38 | Kingfisher County | Low | 0.79 / yr | $5M | |
| 39 | Latimer County | Low | 1.39 / yr | $3M | |
| 40 | Marshall County | Low | 0.39 / yr | $3M | |
| 41 | Custer County | Low | 0.68 / yr | $4M | |
| 42 | Seminole County | Low | 0.61 / yr | $3M | |
| 43 | Woodward County | Low | 0.86 / yr | $4M | |
| 44 | Pushmataha County | Low | 1.57 / yr | $3M | |
| 45 | Pawnee County | Low | 1.32 / yr | $3M | |
| 46 | Beckham County | Very Low | 0.43 / yr | $2M | |
| 47 | Murray County | Very Low | 1.25 / yr | $3M | |
| 48 | Noble County | Very Low | 0.57 / yr | $3M | |
| 49 | Nowata County | Very Low | 1.82 / yr | $2M | |
| 50 | Choctaw County | Very Low | 0.89 / yr | $2M | |
| 51 | Jackson County | Very Low | 0.86 / yr | $3M | |
| 52 | Kiowa County | Very Low | 1.00 / yr | $2M | |
| 53 | Haskell County | Very Low | 1.43 / yr | $3M | |
| 54 | Alfalfa County | Very Low | 0.68 / yr | $2M | |
| 55 | Okfuskee County | Very Low | 1.36 / yr | $2M | |
| 56 | Atoka County | Very Low | 0.79 / yr | $2M | |
| 57 | Washita County | Very Low | 0.43 / yr | $2M | |
| 58 | Johnston County | Very Low | 0.82 / yr | $1M | |
| 59 | Hughes County | Very Low | 0.36 / yr | $2M | |
| 60 | Blaine County | Very Low | 0.57 / yr | $2M | |
| 61 | Love County | Very Low | 0.25 / yr | $2M | |
| 62 | Major County | Very Low | 0.79 / yr | $2M | |
| 63 | Jefferson County | Very Low | 0.86 / yr | $1M | |
| 64 | Grant County | Very Low | 1.07 / yr | $1M | |
| 65 | Woods County | Very Low | 0.64 / yr | $2M | |
| 66 | Coal County | Very Low | 0.50 / yr | $876K | |
| 67 | Texas County | Very Low | 0.46 / yr | $2M | |
| 68 | Roger Mills County | Very Low | 0.36 / yr | $819K | |
| 69 | Ellis County | Very Low | 0.25 / yr | $670K | |
| 70 | Harper County | Very Low | 0.29 / yr | $681K | |
| 71 | Tillman County | Very Low | 0.68 / yr | $748K | |
| 72 | Cotton County | Very Low | 0.50 / yr | $880K | |
| 73 | Greer County | Very Low | 0.43 / yr | $590K | |
| 74 | Dewey County | Very Low | 0.32 / yr | $753K | |
| 75 | Beaver County | Very Low | 0.64 / yr | $773K | |
| 76 | Harmon County | Very Low | 0.18 / yr | $399K | |
| 77 | Cimarron County | Very Low | 0.43 / yr | $317K |
77 Oklahoma counties with measurable riverine flood risk. See the national riverine flood ranking or all Oklahoma counties by overall risk.
Frequently Asked Questions
Which Oklahoma county has the highest riverine flood risk?
Tulsa County has the highest FEMA riverine flood risk score in Oklahoma at 97.9 (High), with $138M in expected annual losses and about 4.75 events per year.
How many Oklahoma counties face significant riverine flood risk?
77 Oklahoma counties record measurable riverine flood risk in FEMA's National Risk Index; 2 of them are rated High or Very High.