Counties in Iowa by traffic fatalities

Polk County had the highest traffic fatalities of 99 counties in 2022, at 33. Union County had the lowest, at 0. The median was 2 and the figure for Iowa was 336. Source: National Highway Traffic Safety Administration.

Highest33Polk County

Lowest0Union County

Median299 counties

Iowa336History

Top 40 counties, 2022

count. Source: NHTSA, Fatality Analysis Reporting System (FARS), national CSV files: people killed (sum of FATALS in accident.csv) by county of the crash. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2022 count	Change on 2021
1	Polk County	33	-26.7%
2	Scott County	18	+12.5%
3	Linn County	14	0%
4	Dubuque County	12	+200%
5	Dallas County	10	+100%
5	Pottawattamie County	10	-9.1%
7	Clinton County	9	+80%
8	Sioux County	8	+166.7%
9	Black Hawk County	7	-22.2%
9	Lee County	7	+75%
9	Story County	7	+75%
12	Muscatine County	6	-14.3%
12	Warren County	6	+100%
14	Adair County	5	+150%
14	Benton County	5	-37.5%
14	Harrison County	5	+66.7%
14	Johnson County	5	-44.4%
14	Mills County	5	n/a
14	O'Brien County	5	n/a
14	Woodbury County	5	-37.5%
21	Carroll County	4	n/a
21	Cerro Gordo County	4	-50%
21	Chickasaw County	4	+100%
21	Des Moines County	4	+33.3%
21	Fremont County	4	-20%
21	Hardin County	4	+300%
21	Humboldt County	4	+300%
21	Jones County	4	-42.9%
21	Marshall County	4	-50%
21	Montgomery County	4	n/a
31	Allamakee County	3	0%
31	Bremer County	3	-50%
31	Emmet County	3	-25%
31	Hamilton County	3	0%
31	Henry County	3	-40%
31	Ida County	3	n/a
31	Jackson County	3	-40%
31	Jasper County	3	-25%
31	Kossuth County	3	n/a
31	Monroe County	3	n/a
31	Plymouth County	3	-25%
31	Wapello County	3	-40%
31	Washington County	3	+50%
31	Wright County	3	+200%
45	Audubon County	2	0%
45	Boone County	2	0%
45	Butler County	2	-60%
45	Cass County	2	-50%
45	Cedar County	2	-50%
45	Cherokee County	2	+100%
45	Clarke County	2	-50%
45	Clayton County	2	-66.7%
45	Crawford County	2	0%
45	Davis County	2	n/a
45	Decatur County	2	n/a
45	Howard County	2	+100%
45	Iowa County	2	0%
45	Jefferson County	2	n/a
45	Madison County	2	+100%
45	Mahaska County	2	0%
45	Marion County	2	-81.8%
45	Osceola County	2	+100%
45	Poweshiek County	2	0%
45	Sac County	2	+100%
45	Shelby County	2	n/a
45	Tama County	2	-33.3%
45	Van Buren County	2	n/a
45	Webster County	2	-60%
45	Winnebago County	2	0%
45	Winneshiek County	2	-50%
45	Worth County	2	-33.3%
72	Appanoose County	1	0%
72	Buchanan County	1	-75%
72	Buena Vista County	1	-66.7%
72	Calhoun County	1	n/a
72	Clay County	1	-50%
72	Delaware County	1	-66.7%
72	Dickinson County	1	-66.7%
72	Fayette County	1	-75%
72	Guthrie County	1	n/a
72	Hancock County	1	0%
72	Louisa County	1	-50%
72	Lucas County	1	0%
72	Lyon County	1	0%
72	Mitchell County	1	-66.7%
72	Palo Alto County	1	n/a
72	Pocahontas County	1	n/a
72	Ringgold County	1	0%
72	Wayne County	1	-50%
90	Adams County	0	-100%
90	Floyd County	0	-100%
90	Franklin County	0	-100%
90	Greene County	0	-100%
90	Grundy County	0	-100%
90	Keokuk County	0	n/a
90	Monona County	0	-100%
90	Page County	0	-100%
90	Taylor County	0	-100%
90	Union County	0	n/a

Other periods

About this ranking

People killed in motor vehicle traffic crashes during the year. FARS counts people who die within 30 days of a crash involving a motor vehicle travelling on a public road, by the place of the crash, not of residence.

A police-based count of deaths. It differs from death certificate counts (CDC) and from the WHO road traffic death rate (road_traffic_death_rate), which is modelled for international comparison.

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

National Highway Traffic Safety Administration (NHTSA), Fatality Analysis Reporting System. Fatality Analysis Reporting System (FARS), national CSV files: people killed (sum of FATALS in accident.csv) by county of the crash. https://static.nhtsa.gov/nhtsa/downloads/FARS/2022/National/FARS2022NationalCSV.zip. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

National Highway Traffic Safety Administration. (2026). Fatality Analysis Reporting System (FARS), national CSV files: people killed (sum of FATALS in accident.csv) by county of the crash (Counties in Iowa by traffic fatalities, 2022) [Data set]. Retrieved October 12, 2026, from https://static.nhtsa.gov/nhtsa/downloads/FARS/2022/National/FARS2022NationalCSV.zip

MLA 9

Fatality Analysis Reporting System (FARS), national CSV files: people killed (sum of FATALS in accident.csv) by county of the crash, Counties in Iowa by traffic fatalities, 2022. National Highway Traffic Safety Administration, 24 June 2026, https://static.nhtsa.gov/nhtsa/downloads/FARS/2022/National/FARS2022NationalCSV.zip. Invokely, https://invokely.ai/rankings/traffic-fatalities/iowa-counties?period=2022. Accessed 12 Oct. 2026.

Chicago (author-date)

National Highway Traffic Safety Administration. 2026. Fatality Analysis Reporting System (FARS), national CSV files: people killed (sum of FATALS in accident.csv) by county of the crash. Counties in Iowa by traffic fatalities, 2022. Dataset. Accessed October 12, 2026. https://static.nhtsa.gov/nhtsa/downloads/FARS/2022/National/FARS2022NationalCSV.zip. Also distributed by Invokely, https://invokely.ai/rankings/traffic-fatalities/iowa-counties?period=2022.

Harvard

National Highway Traffic Safety Administration (2026) Fatality Analysis Reporting System (FARS), national CSV files: people killed (sum of FATALS in accident.csv) by county of the crash, Counties in Iowa by traffic fatalities, 2022 [Dataset]. Available at: https://static.nhtsa.gov/nhtsa/downloads/FARS/2022/National/FARS2022NationalCSV.zip, via Invokely: https://invokely.ai/rankings/traffic-fatalities/iowa-counties?period=2022 (Accessed: 12 October 2026).

BibTeX

@misc{national_counties_in_iowa_by_2022,
  author = {{National Highway Traffic Safety Administration}},
  title = {{Fatality Analysis Reporting System (FARS), national CSV files: people killed (sum of FATALS in accident.csv) by county of the crash: Counties in Iowa by traffic fatalities, 2022}},
  year = {2026},
  howpublished = {Data set},
  url = {https://static.nhtsa.gov/nhtsa/downloads/FARS/2022/National/FARS2022NationalCSV.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/traffic-fatalities/iowa-counties?period=2022. Publisher attribution: National Highway Traffic Safety Administration (NHTSA), Fatality Analysis Reporting System. Fatality Analysis Reporting System (FARS), national CSV files: people killed (sum of FATALS in accident.csv) by county of the crash. https://static.nhtsa.gov/nhtsa/downloads/FARS/2022/National/FARS2022NationalCSV.zip. Retrieved 2026-10-12.},
}

RIS

TY  - DATA
AU  - National Highway Traffic Safety Administration
TI  - Fatality Analysis Reporting System (FARS), national CSV files: people killed (sum of FATALS in accident.csv) by county of the crash: Counties in Iowa by traffic fatalities, 2022
PY  - 2026
DA  - 2026/06/24
PB  - National Highway Traffic Safety Administration
DB  - Invokely
UR  - https://static.nhtsa.gov/nhtsa/downloads/FARS/2022/National/FARS2022NationalCSV.zip
L2  - https://invokely.ai/rankings/traffic-fatalities/iowa-counties?period=2022
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/traffic-fatalities/iowa-counties?period=2022.
N1  - Publisher attribution: National Highway Traffic Safety Administration (NHTSA), Fatality Analysis Reporting System. Fatality Analysis Reporting System (FARS), national CSV files: people killed (sum of FATALS in accident.csv) by county of the crash. https://static.nhtsa.gov/nhtsa/downloads/FARS/2022/National/FARS2022NationalCSV.zip. Retrieved 2026-10-12.
ER  -

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Questions

Which county has the highest traffic fatalities?

Polk County, with 33 in 2022, according to National Highway Traffic Safety Administration.

Which county has the lowest traffic fatalities?

Union County, with 0 in 2022.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: National Highway Traffic Safety Administration, Fatality Analysis Reporting System (FARS), national CSV files: people killed (sum of FATALS in accident.csv) by county of the crash. Retrieved 2026-10-12.