Reference only. Data sourced from HUD/FHFA (2025). This site is a private entity and not affiliated with any government agency.
Skip to main content
DotGovSource
Government-backed calculators
FHA Loan Limits
Per Diem
Flood Risk
Inflation
Student Loans
Fuel Economy
Solar Potential
Safe Withdrawal
Hardiness Zones
Search calculators
Search
Home
/
Flood Risk
/
Illinois
Flood risk by county
National Risk Index scores attached to every county calculator.
County
Risk
Score
Details
Adams County
High
79
View
Alexander County
Moderate
32
View
Bond County
Very High
82
View
Boone County
Very High
80
View
Brown County
Very High
98
View
Bureau County
High
73
View
Calhoun County
Very High
82
View
Carroll County
Very High
98
View
Cass County
Very High
98
View
Champaign County
Moderate
33
View
Christian County
Very High
90
View
Clark County
Very High
98
View
Clay County
Very High
98
View
Clinton County
Very High
82
View
Coles County
Moderate
33
View
Cook County
Moderate
33
View
Crawford County
Very High
98
View
Cumberland County
Moderate
33
View
De Witt County
Very High
98
View
Dekalb County
Moderate
33
View
Douglas County
Very High
98
View
Dupage County
Moderate
33
View
Edgar County
Very High
98
View
Edwards County
Very High
98
View
Effingham County
Moderate
41
View
Fayette County
Very High
98
View
Ford County
Very High
98
View
Franklin County
Very High
98
View
Fulton County
High
75
View
Gallatin County
Very High
98
View
Greene County
Very High
98
View
Grundy County
Moderate
33
View
Hamilton County
Very High
98
View
Hancock County
Moderate
45
View
Hardin County
Very High
98
View
Henderson County
Moderate
30
View
Henry County
Moderate
38
View
Iroquois County
Very High
98
View
Jackson County
Moderate
32
View
Jasper County
Very High
98
View
Jefferson County
High
69
View
Jersey County
Very High
82
View
Jo Daviess County
Very High
98
View
Johnson County
Moderate
32
View
Kane County
Moderate
33
View
Kankakee County
High
56
View
Kendall County
Moderate
33
View
Knox County
Moderate
47
View
Lake County
Moderate
33
View
Lasalle County
High
73
View
Lawrence County
Very High
98
View
Lee County
Moderate
39
View
Livingston County
High
77
View
Logan County
High
61
View
Macon County
Moderate
39
View
Macoupin County
Very High
82
View
Madison County
Very High
82
View
Marion County
Moderate
32
View
Marshall County
High
75
View
Mason County
Very High
98
View
Massac County
High
74
View
Mcdonough County
High
62
View
Mchenry County
Moderate
33
View
Mclean County
Low
28
View
Menard County
Very High
88
View
Mercer County
Moderate
38
View
Monroe County
Very High
82
View
Montgomery County
Very High
98
View
Morgan County
Moderate
54
View
Moultrie County
Very High
98
View
Ogle County
Very High
80
View
Peoria County
High
75
View
Perry County
Very High
98
View
Piatt County
Moderate
33
View
Pike County
Very High
98
View
Pope County
Very High
98
View
Pulaski County
Very High
98
View
Putnam County
High
73
View
Randolph County
Very High
98
View
Richland County
Very High
98
View
Rock Island County
Moderate
38
View
Saline County
Very High
98
View
Sangamon County
Very High
88
View
Schuyler County
Very High
98
View
Scott County
Moderate
54
View
Shelby County
Very High
98
View
St. Clair County
Very High
82
View
Stark County
High
75
View
Stephenson County
Moderate
46
View
Tazewell County
High
75
View
Union County
Very High
98
View
Vermilion County
Moderate
38
View
Wabash County
Very High
98
View
Warren County
Very High
98
View
Washington County
Very High
98
View
Wayne County
Very High
98
View
White County
Very High
98
View
Whiteside County
Very High
89
View
Will County
Moderate
33
View
Williamson County
Moderate
32
View
Winnebago County
Very High
80
View
Woodford County
High
75
View