Riverine Flood Risk in Indiana
All Indiana 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 92 of 92 Indiana counties in FEMA's National Risk Index. Marion County carries the state's highest riverine flood score at 98.3, with $163M in expected annual riverine flood losses.
3 Indiana counties are rated High or Very High for riverine flood, and expected annual losses from riverine flood total roughly $1.21B 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 | Marion County | High | 2.93 / yr | $163M | |
| 2 | Lake County | High | 2.39 / yr | $90M | |
| 3 | Allen County | High | 1.07 / yr | $60M | |
| 4 | Hamilton County | Medium | 1.82 / yr | $73M | |
| 5 | Vanderburgh County | Medium | 4.25 / yr | $36M | |
| 6 | St. Joseph County | Medium | 0.64 / yr | $28M | |
| 7 | Vigo County | Medium | 4.00 / yr | $24M | |
| 8 | Elkhart County | Medium | 0.39 / yr | $23M | |
| 9 | Madison County | Medium | 1.71 / yr | $20M | |
| 10 | Delaware County | Medium | 2.04 / yr | $21M | |
| 11 | Clark County | Medium | 2.25 / yr | $25M | |
| 12 | Hendricks County | Medium | 1.39 / yr | $34M | |
| 13 | Monroe County | Medium | 1.57 / yr | $22M | |
| 14 | Porter County | Medium | 1.54 / yr | $25M | |
| 15 | Tippecanoe County | Medium | 4.14 / yr | $21M | |
| 16 | Wayne County | Medium | 2.07 / yr | $14M | |
| 17 | Johnson County | Medium | 1.61 / yr | $30M | |
| 18 | Bartholomew County | Medium | 1.64 / yr | $20M | |
| 19 | LaPorte County | Medium | 0.36 / yr | $15M | |
| 20 | Floyd County | Medium | 1.36 / yr | $17M | |
| 21 | Grant County | Medium | 0.50 / yr | $12M | |
| 22 | Morgan County | Low | 2.21 / yr | $15M | |
| 23 | Warrick County | Low | 5.21 / yr | $15M | |
| 24 | Dubois County | Low | 2.36 / yr | $12M | |
| 25 | LaGrange County | Low | 0.14 / yr | $6M | |
| 26 | Miami County | Low | 0.39 / yr | $10M | |
| 27 | Howard County | Low | 0.93 / yr | $11M | |
| 28 | Cass County | Low | 0.54 / yr | $8M | |
| 29 | Kosciusko County | Low | 0.46 / yr | $10M | |
| 30 | Daviess County | Low | 3.54 / yr | $7M | |
| 31 | Adams County | Low | 0.43 / yr | $7M | |
| 32 | Jackson County | Low | 4.04 / yr | $10M | |
| 33 | Hancock County | Low | 0.96 / yr | $13M | |
| 34 | Boone County | Low | 1.32 / yr | $15M | |
| 35 | Harrison County | Low | 1.71 / yr | $9M | |
| 36 | Jefferson County | Low | 3.29 / yr | $8M | |
| 37 | Lawrence County | Low | 2.68 / yr | $9M | |
| 38 | Henry County | Low | 0.64 / yr | $8M | |
| 39 | Ripley County | Low | 3.21 / yr | $7M | |
| 40 | Knox County | Low | 5.21 / yr | $7M | |
| 41 | Franklin County | Low | 1.71 / yr | $8M | |
| 42 | Dearborn County | Low | 2.32 / yr | $9M | |
| 43 | Shelby County | Low | 1.39 / yr | $8M | |
| 44 | Greene County | Low | 3.43 / yr | $7M | |
| 45 | DeKalb County | Low | 0.25 / yr | $7M | |
| 46 | Posey County | Low | 7.86 / yr | $8M | |
| 47 | Owen County | Low | 2.93 / yr | $6M | |
| 48 | Perry County | Low | 2.46 / yr | $7M | |
| 49 | Fayette County | Low | 1.71 / yr | $6M | |
| 50 | White County | Low | 0.57 / yr | $7M | |
| 51 | Noble County | Low | 0.11 / yr | $6M | |
| 52 | Huntington County | Low | 0.64 / yr | $7M | |
| 53 | Putnam County | Low | 1.57 / yr | $7M | |
| 54 | Orange County | Low | 1.29 / yr | $6M | |
| 55 | Washington County | Low | 1.25 / yr | $6M | |
| 56 | Wabash County | Low | 0.64 / yr | $6M | |
| 57 | Carroll County | Low | 1.43 / yr | $8M | |
| 58 | Randolph County | Low | 1.43 / yr | $5M | |
| 59 | Spencer County | Low | 2.86 / yr | $6M | |
| 60 | Marshall County | Low | 0.32 / yr | $6M | |
| 61 | Jasper County | Low | 0.75 / yr | $7M | |
| 62 | Jennings County | Low | 1.36 / yr | $5M | |
| 63 | Montgomery County | Low | 1.14 / yr | $6M | |
| 64 | Crawford County | Low | 1.71 / yr | $3M | |
| 65 | Steuben County | Low | 0.29 / yr | $5M | |
| 66 | Brown County | Low | 0.86 / yr | $4M | |
| 67 | Wells County | Low | 0.32 / yr | $5M | |
| 68 | Gibson County | Low | 8.68 / yr | $5M | |
| 69 | Jay County | Low | 0.54 / yr | $4M | |
| 70 | Decatur County | Low | 0.93 / yr | $7M | |
| 71 | Clinton County | Very Low | 1.18 / yr | $5M | |
| 72 | Parke County | Very Low | 4.00 / yr | $3M | |
| 73 | Whitley County | Very Low | 0.64 / yr | $5M | |
| 74 | Clay County | Very Low | 1.36 / yr | $5M | |
| 75 | Vermillion County | Very Low | 3.89 / yr | $4M | |
| 76 | Rush County | Very Low | 0.89 / yr | $4M | |
| 77 | Martin County | Very Low | 1.50 / yr | $3M | |
| 78 | Starke County | Very Low | 0.11 / yr | $3M | |
| 79 | Pike County | Very Low | 5.64 / yr | $3M | |
| 80 | Scott County | Very Low | 0.64 / yr | $3M | |
| 81 | Sullivan County | Very Low | 3.57 / yr | $3M | |
| 82 | Switzerland County | Very Low | 1.71 / yr | $3M | |
| 83 | Fountain County | Very Low | 3.57 / yr | $3M | |
| 84 | Fulton County | Very Low | 0.39 / yr | $2M | |
| 85 | Newton County | Very Low | 0.71 / yr | $3M | |
| 86 | Tipton County | Very Low | 0.71 / yr | $4M | |
| 87 | Blackford County | Very Low | 0.25 / yr | $2M | |
| 88 | Pulaski County | Very Low | 0.14 / yr | $2M | |
| 89 | Warren County | Very Low | 3.18 / yr | $2M | |
| 90 | Union County | Very Low | 1.32 / yr | $2M | |
| 91 | Benton County | Very Low | 0.64 / yr | $1M | |
| 92 | Ohio County | Very Low | 1.04 / yr | $1M |
92 Indiana counties with measurable riverine flood risk. See the national riverine flood ranking or all Indiana counties by overall risk.
Frequently Asked Questions
Which Indiana county has the highest riverine flood risk?
Marion County has the highest FEMA riverine flood risk score in Indiana at 98.3 (High), with $163M in expected annual losses and about 2.93 events per year.
How many Indiana counties face significant riverine flood risk?
92 Indiana counties record measurable riverine flood risk in FEMA's National Risk Index; 3 of them are rated High or Very High.