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

#CountyRiverine Flood ScoreRatingAnn. Freq.Ann. Loss
1 Marion County
98.3
High 2.93 / yr $163M
2 Lake County
96.2
High 2.39 / yr $90M
3 Allen County
93.5
High 1.07 / yr $60M
4 Hamilton County
91.1
Medium 1.82 / yr $73M
5 Vanderburgh County
89.8
Medium 4.25 / yr $36M
6 St. Joseph County
85.4
Medium 0.64 / yr $28M
7 Vigo County
85.1
Medium 4.00 / yr $24M
8 Elkhart County
84.1
Medium 0.39 / yr $23M
9 Madison County
82.6
Medium 1.71 / yr $20M
10 Delaware County
82.5
Medium 2.04 / yr $21M
11 Clark County
81.2
Medium 2.25 / yr $25M
12 Hendricks County
81.0
Medium 1.39 / yr $34M
13 Monroe County
80.8
Medium 1.57 / yr $22M
14 Porter County
80.0
Medium 1.54 / yr $25M
15 Tippecanoe County
79.7
Medium 4.14 / yr $21M
16 Wayne County
79.7
Medium 2.07 / yr $14M
17 Johnson County
78.9
Medium 1.61 / yr $30M
18 Bartholomew County
78.0
Medium 1.64 / yr $20M
19 LaPorte County
74.6
Medium 0.36 / yr $15M
20 Floyd County
74.2
Medium 1.36 / yr $17M
21 Grant County
73.4
Medium 0.50 / yr $12M
22 Morgan County
70.9
Low 2.21 / yr $15M
23 Warrick County
68.9
Low 5.21 / yr $15M
24 Dubois County
66.1
Low 2.36 / yr $12M
25 LaGrange County
65.6
Low 0.14 / yr $6M
26 Miami County
65.1
Low 0.39 / yr $10M
27 Howard County
64.5
Low 0.93 / yr $11M
28 Cass County
64.1
Low 0.54 / yr $8M
29 Kosciusko County
63.7
Low 0.46 / yr $10M
30 Daviess County
62.2
Low 3.54 / yr $7M
31 Adams County
61.3
Low 0.43 / yr $7M
32 Jackson County
57.6
Low 4.04 / yr $10M
33 Hancock County
57.1
Low 0.96 / yr $13M
34 Boone County
56.8
Low 1.32 / yr $15M
35 Harrison County
56.7
Low 1.71 / yr $9M
36 Jefferson County
55.9
Low 3.29 / yr $8M
37 Lawrence County
55.9
Low 2.68 / yr $9M
38 Henry County
54.8
Low 0.64 / yr $8M
39 Ripley County
53.8
Low 3.21 / yr $7M
40 Knox County
53.4
Low 5.21 / yr $7M
41 Franklin County
52.7
Low 1.71 / yr $8M
42 Dearborn County
52.6
Low 2.32 / yr $9M
43 Shelby County
52.5
Low 1.39 / yr $8M
44 Greene County
52.0
Low 3.43 / yr $7M
45 DeKalb County
51.8
Low 0.25 / yr $7M
46 Posey County
51.2
Low 7.86 / yr $8M
47 Owen County
49.4
Low 2.93 / yr $6M
48 Perry County
49.0
Low 2.46 / yr $7M
49 Fayette County
48.7
Low 1.71 / yr $6M
50 White County
48.6
Low 0.57 / yr $7M
51 Noble County
48.4
Low 0.11 / yr $6M
52 Huntington County
48.3
Low 0.64 / yr $7M
53 Putnam County
48.1
Low 1.57 / yr $7M
54 Orange County
47.6
Low 1.29 / yr $6M
55 Washington County
47.4
Low 1.25 / yr $6M
56 Wabash County
47.3
Low 0.64 / yr $6M
57 Carroll County
47.2
Low 1.43 / yr $8M
58 Randolph County
47.0
Low 1.43 / yr $5M
59 Spencer County
45.5
Low 2.86 / yr $6M
60 Marshall County
44.9
Low 0.32 / yr $6M
61 Jasper County
44.9
Low 0.75 / yr $7M
62 Jennings County
44.4
Low 1.36 / yr $5M
63 Montgomery County
42.8
Low 1.14 / yr $6M
64 Crawford County
40.9
Low 1.71 / yr $3M
65 Steuben County
38.2
Low 0.29 / yr $5M
66 Brown County
38.0
Low 0.86 / yr $4M
67 Wells County
37.7
Low 0.32 / yr $5M
68 Gibson County
36.9
Low 8.68 / yr $5M
69 Jay County
36.8
Low 0.54 / yr $4M
70 Decatur County
36.5
Low 0.93 / yr $7M
71 Clinton County
34.9
Very Low 1.18 / yr $5M
72 Parke County
34.4
Very Low 4.00 / yr $3M
73 Whitley County
34.3
Very Low 0.64 / yr $5M
74 Clay County
34.2
Very Low 1.36 / yr $5M
75 Vermillion County
33.0
Very Low 3.89 / yr $4M
76 Rush County
28.5
Very Low 0.89 / yr $4M
77 Martin County
28.3
Very Low 1.50 / yr $3M
78 Starke County
27.5
Very Low 0.11 / yr $3M
79 Pike County
26.8
Very Low 5.64 / yr $3M
80 Scott County
23.9
Very Low 0.64 / yr $3M
81 Sullivan County
23.0
Very Low 3.57 / yr $3M
82 Switzerland County
21.5
Very Low 1.71 / yr $3M
83 Fountain County
21.1
Very Low 3.57 / yr $3M
84 Fulton County
20.5
Very Low 0.39 / yr $2M
85 Newton County
19.3
Very Low 0.71 / yr $3M
86 Tipton County
18.9
Very Low 0.71 / yr $4M
87 Blackford County
18.7
Very Low 0.25 / yr $2M
88 Pulaski County
18.4
Very Low 0.14 / yr $2M
89 Warren County
12.3
Very Low 3.18 / yr $2M
90 Union County
9.5
Very Low 1.32 / yr $2M
91 Benton County
8.5
Very Low 0.64 / yr $1M
92 Ohio County
7.8
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.

Other Hazards in Indiana