Biological history in Iowa

Iowa has 198 county-level biological declarations across 99 counties. Adair County leads with 2 declarations. Total tracked FEMA obligations for biological events in this state: $470.7M.

This page shows every Iowa county in Iowa that has at least one FEMA biological declaration on record, ranked by how many times that hazard type triggered federal aid. Counties near the top of this list have recurring exposure to biological events — useful context for anyone evaluating property risk, insurance needs, or emergency planning in the area.

For the full national view of biological declarations across all states, see the biological disaster type page. For all hazard types in Iowa, see the Iowa state page.

Biological in Iowa

Counties ranked by biological declaration count

#	County	Declarations	Tracked aid
1	Adair County	2	$255K
2	Adams County	2	$26K
3	Allamakee County	2	$155K
4	Appanoose County	2	$141K
5	Audubon County	2	$40K
6	Benton County	2	$250K
7	Black Hawk County	2	$30.2M
8	Boone County	2	$209K
9	Bremer County	2	$380K
10	Buchanan County	2	$163K
11	Buena Vista County	2	$192K
12	Butler County	2	$97K
13	Calhoun County	2	$159K
14	Carroll County	2	$667K
15	Cass County	2	$287K
16	Cedar County	2	$185K
17	Cerro Gordo County	2	$1.5M
18	Cherokee County	2	$321K
19	Chickasaw County	2	$61K
20	Clarke County	2	$108K
21	Clay County	2	$118K
22	Clayton County	2	$716K
23	Clinton County	2	$1.1M
24	Crawford County	2	$1.3M
25	Dallas County	2	$1.0M
26	Davis County	2	$130K
27	Decatur County	2	$158K
28	Delaware County	2	$5.3M
29	Des Moines County	2	$1.0M
30	Dickinson County	2	$363K
31	Dubuque County	2	$6.9M
32	Emmet County	2	$574K
33	Fayette County	2	$197K
34	Floyd County	2	$169K
35	Franklin County	2	$34K
36	Fremont County	2	$67K
37	Greene County	2	$58K
38	Grundy County	2	$104K
39	Guthrie County	2	$114K
40	Hamilton County	2	$198K
41	Hancock County	2	$115K
42	Hardin County	2	$138K
43	Harrison County	2	$186K
44	Henry County	2	$568K
45	Howard County	2	$121K
46	Humboldt County	2	$113K
47	Ida County	2	$125K
48	Iowa County	2	$267K
49	Jackson County	2	$161K
50	Jasper County	2	$635K
51	Jefferson County	2	$148K
52	Johnson County	2	$30.8M
53	Jones County	2	$598K
54	Keokuk County	2	$69K
55	Kossuth County	2	$501K
56	Lee County	2	$523K
57	Linn County	2	$31.3M
58	Louisa County	2	$88K
59	Lucas County	2	$92K
60	Lyon County	2	$114K
61	Madison County	2	$83K
62	Mahaska County	2	$752K
63	Marion County	2	$1.5M
64	Marshall County	2	$5.5M
65	Mills County	2	$179K
66	Mitchell County	2	$81K
67	Monona County	2	$132K
68	Monroe County	2	$198K
69	Montgomery County	2	$126K
70	Muscatine County	2	$224K
71	O'Brien County	2	$166K
72	Osceola County	2	$248K
73	Page County	2	$571K
74	Palo Alto County	2	$134K
75	Plymouth County	2	$228K
76	Pocahontas County	2	$82K
77	Polk County	2	$270.5M
78	Pottawattamie County	2	$3.3M
79	Poweshiek County	2	$1.4M
80	Ringgold County	2	$70K
81	Sac County	2	$66K
82	Scott County	2	$40.9M
83	Shelby County	2	$176K
84	Sioux County	2	$523K
85	Story County	2	$6.9M
86	Tama County	2	$196K
87	Taylor County	2	$37K
88	Union County	2	$257K
89	Van Buren County	2	$74K
90	Wapello County	2	$526K
91	Warren County	2	$304K
92	Washington County	2	$140K
93	Wayne County	2	$168K
94	Webster County	2	$1.3M
95	Winnebago County	2	$172K
96	Winneshiek County	2	$294K
97	Woodbury County	2	$11.2M
98	Worth County	2	$43K
99	Wright County	2	$156K