Data / Rankings / Traffic fatality rate / Counties in Iowa

Counties in Iowa by traffic fatality rate, 2024

Worth County had the highest traffic fatality rate of 99 counties in 2024, at 54.7 per 100,000 people. Taylor County had the lowest, at 0 per 100,000 people. The median was 11.4 per 100,000 people and the figure for Iowa was 11 per 100,000 people. Source: NHTSA and BEA.

Highest54.7Worth County
Lowest0Taylor County
Median11.499 counties
Iowa11History

Top 40 counties, 2024

Worth County: 54.7 per 100,000 peopleWorth County54.7Greene County: 46.2 per 100,000 peopleGreene County46.2Wayne County: 45.3 per 100,000 peopleWayne County45.3Decatur County: 39.2 per 100,000 peopleDecatur County39.2Iowa County: 36.5 per 100,000 peopleIowa County36.5Washington County: 35.4 per 100,000 peopleWashington County35.4Sac County: 31.5 per 100,000 peopleSac County31.5Humboldt County: 31.2 per 100,000 peopleHumboldt County31.2Fremont County: 30.8 per 100,000 peopleFremont County30.8Winnebago County: 28.9 per 100,000 peopleWinnebago County28.9Van Buren County: 27.7 per 100,000 peopleVan Buren County27.7Hardin County: 24.3 per 100,000 peopleHardin County24.3Jones County: 23.7 per 100,000 peopleJones County23.7Plymouth County: 23.2 per 100,000 peoplePlymouth County23.2Cedar County: 21.9 per 100,000 peopleCedar County21.9Ringgold County: 21.7 per 100,000 peopleRinggold County21.7Poweshiek County: 21.7 per 100,000 peoplePoweshiek County21.7Muscatine County: 21.4 per 100,000 peopleMuscatine County21.4Kossuth County: 20.8 per 100,000 peopleKossuth County20.8Mills County: 20.4 per 100,000 peopleMills County20.4Hamilton County: 20.2 per 100,000 peopleHamilton County20.2Carroll County: 19.6 per 100,000 peopleCarroll County19.6Hancock County: 18.8 per 100,000 peopleHancock County18.8Guthrie County: 18.6 per 100,000 peopleGuthrie County18.6Audubon County: 18 per 100,000 peopleAudubon County18Madison County: 17.5 per 100,000 peopleMadison County17.5Shelby County: 16.9 per 100,000 peopleShelby County16.9Cerro Gordo County: 16.5 per 100,000 peopleCerro Gordo County16.5Lyon County: 16.2 per 100,000 peopleLyon County16.2Fayette County: 15.7 per 100,000 peopleFayette County15.7Benton County: 15.5 per 100,000 peopleBenton County15.5Henry County: 15.5 per 100,000 peopleHenry County15.5Jackson County: 15.5 per 100,000 peopleJackson County15.5Clinton County: 15.2 per 100,000 peopleClinton County15.2Ida County: 14.7 per 100,000 peopleIda County14.7Buena Vista County: 14.4 per 100,000 peopleBuena Vista County14.4Butler County: 14.1 per 100,000 peopleButler County14.1Allamakee County: 14.1 per 100,000 peopleAllamakee County14.1O'Brien County: 14 per 100,000 peopleO'Brien County14Monroe County: 13.6 per 100,000 peopleMonroe County13.6
per 100,000 people. Source: Invokely calculation with data from NHTSA, BEA. Retrieved 2026-10-12.

Full ranking

RankCounties2024
per 100,000 people		Change on 2023
1Worth County Estimated54.7+54.7 pts
2Greene County Estimated46.2-12 pts
3Wayne County Estimated45.3+45.3 pts
4Decatur County Estimated39.2-12.2 pts
5Iowa County Estimated36.5+6 pts
6Washington County Estimated35.4+26.5 pts
7Sac County Estimated31.5+21.1 pts
8Humboldt County Estimated31.2+20.7 pts
9Fremont County Estimated30.8-46.6 pts
10Winnebago County Estimated28.9+28.9 pts
11Van Buren County Estimated27.7+27.7 pts
12Hardin County Estimated24.3+24.3 pts
13Jones County Estimated23.7+9.3 pts
14Plymouth County Estimated23.2+3.8 pts
15Cedar County Estimated21.9-5.4 pts
16Ringgold County Estimated21.7-21.3 pts
17Poweshiek County Estimated21.7-5.4 pts
18Muscatine County Estimated21.4+11.9 pts
19Kossuth County Estimated20.8+13.9 pts
20Mills County Estimated20.4+13.6 pts
21Hamilton County Estimated20.2+6.7 pts
22Carroll County Estimated19.6+5 pts
23Hancock County Estimated18.8+9.4 pts
24Guthrie County Estimated18.6+9.3 pts
25Audubon County Estimated18-0.1 pts
26Madison County Estimated17.5-6 pts
27Shelby County Estimated16.9+8.5 pts
28Cerro Gordo County Estimated16.5+14.1 pts
29Lyon County Estimated16.2+8 pts
30Fayette County Estimated15.7+5.3 pts
31Benton County Estimated15.5+7.7 pts
32Henry County Estimated15.5+10.4 pts
33Jackson County Estimated15.5+10.3 pts
34Clinton County Estimated15.2+4.4 pts
35Ida County Estimated14.7-14.6 pts
36Buena Vista County Estimated14.4-0.1 pts
37Butler County Estimated14.1+0.1 pts
38Allamakee County Estimated14.1-7.1 pts
39O'Brien County Estimated14+14 pts
40Monroe County Estimated13.6-13.2 pts
41Scott County Estimated13.1+3.9 pts
42Lee County Estimated12.4-3 pts
43Crawford County Estimated12.2-6.4 pts
44Clay County Estimated12.1+6.1 pts
45Tama County Estimated11.9+11.9 pts
46Monona County Estimated11.9+0.1 pts
47Clayton County Estimated11.8-5.8 pts
48Marion County Estimated11.7+5.8 pts
49Lucas County Estimated11.40 pts
50Delaware County Estimated11.4-0 pts
51Palo Alto County Estimated11.4+11.4 pts
52Black Hawk County Estimated11.3+1.4 pts
53Boone County Estimated11.2-15.1 pts
54Wapello County Estimated11.2-0.1 pts
55Dubuque County Estimated11.1+7 pts
56Dickinson County Estimated11+5.5 pts
57Davis County Estimated10.9-32.8 pts
58Webster County Estimated10.8-11 pts
59Clarke County Estimated10.5-20.6 pts
60Jasper County Estimated10.5-7.9 pts
61Calhoun County Estimated10.3+10.3 pts
62Woodbury County Estimated10.3+1.8 pts
63Keokuk County Estimated10.1-30.1 pts
64Winneshiek County Estimated10.1-15.2 pts
65Franklin County Estimated10-20.3 pts
66Montgomery County Estimated9.9-9.8 pts
67Marshall County Estimated9.9-7.5 pts
68Pottawattamie County Estimated9.6-4.3 pts
69Mitchell County Estimated9.4-9.6 pts
70Polk County Estimated9.1+1.4 pts
71Mahaska County Estimated9.1-9.1 pts
72Chickasaw County Estimated8.5-8.6 pts
73Union County Estimated8.4-42 pts
74Sioux County Estimated8.2-8.3 pts
75Wright County Estimated7.9-15.7 pts
76Des Moines County Estimated7.8+5.2 pts
77Linn County Estimated7.8-4 pts
78Cass County Estimated7.7-30.4 pts
79Warren County Estimated7.1-0.1 pts
80Floyd County Estimated6.7-26.1 pts
81Page County Estimated6.7-20 pts
82Jefferson County Estimated6.3-0.1 pts
83Johnson County Estimated5-1.3 pts
84Buchanan County Estimated4.8-4.8 pts
85Story County Estimated3.9-0 pts
86Dallas County Estimated1.7-10.8 pts
87Adair County Estimated00 pts
87Adams County Estimated00 pts
87Appanoose County Estimated0-8.2 pts
87Bremer County Estimated0-4 pts
87Cherokee County Estimated0-8.6 pts
87Emmet County Estimated0-10.8 pts
87Grundy County Estimated0-32.2 pts
87Harrison County Estimated0-47.8 pts
87Howard County Estimated00 pts
87Louisa County Estimated0-66.4 pts
87Osceola County Estimated0-33.2 pts
87Pocahontas County Estimated00 pts
87Taylor County Estimated0-16.9 pts

Other periods

About this ranking

Traffic fatalities (NHTSA FARS) per 100,000 residents in the same year and place.

Deaths are counted where the crash happened and divided by the resident population, so counties with busy highways and few residents can show very high rates. Differs from the WHO road traffic death rate (road_traffic_death_rate).

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

Invokely calculation from NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents. https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k. Retrieved 2026-10-12.

Citation styles

Invokely calculated this figure from the publishers' data, so Invokely is the author and the publishers of the inputs are named.

APA 7

Invokely. (n.d.). NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents (Counties in Iowa by traffic fatality rate, 2024) [Data set]. Calculated from data by NHTSA and BEA. Retrieved October 12, 2026, from https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k

MLA 9

NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents, Counties in Iowa by traffic fatality rate, 2024. Calculated from data by NHTSA and BEA. Invokely, https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k. Accessed 12 Oct. 2026.

Chicago (author-date)

Invokely. n.d. NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents. Counties in Iowa by traffic fatality rate, 2024. Dataset. Calculated from data by NHTSA and BEA. Accessed October 12, 2026. https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k.

Harvard

Invokely (no date) NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents, Counties in Iowa by traffic fatality rate, 2024 [Dataset]. Calculated from data by NHTSA and BEA. Available at: https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k (Accessed: 12 October 2026).

BibTeX
@misc{invokely_counties_in_iowa_by_2024,
  author = {{Invokely}},
  title = {{NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents: Counties in Iowa by traffic fatality rate, 2024}},
  howpublished = {Data set},
  url = {https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k},
  urldate = {2026-10-12},
  note = {Calculated from data by NHTSA and BEA. Accessed via Invokely, https://invokely.ai/rankings/traffic-fatality-rate/iowa-counties. Publisher attribution: Invokely calculation from NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents. https://invokely.ai/docs/methodology\#traffic\_fatality\_rate\_per\_100k. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - Invokely
TI  - NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents: Counties in Iowa by traffic fatality rate, 2024
PB  - Invokely
DB  - Invokely
UR  - https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k
L2  - https://invokely.ai/rankings/traffic-fatality-rate/iowa-counties
Y2  - 2026/10/12
N1  - Calculated from data by NHTSA and BEA.
N1  - Accessed via Invokely, https://invokely.ai/rankings/traffic-fatality-rate/iowa-counties.
N1  - Publisher attribution: Invokely calculation from NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents. https://invokely.ai/docs/methodology#traffic_fatality_rate_per_100k. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest traffic fatality rate?

Worth County, with 54.7 per 100,000 people in 2024, according to NHTSA and BEA.

Which county has the lowest traffic fatality rate?

Taylor County, with 0 per 100,000 people in 2024.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: Invokely, NHTSA FARS traffic fatalities divided by BEA mid-year population (SAINC1 and CAINC1), per 100,000 residents. Retrieved 2026-10-12.

Traffic fatality rate: other rankings

Counties in Iowa: more rankings