Counties in Iowa by traffic fatalities

Scott County had the highest traffic fatalities of 99 counties in 2015, at 21. Winnebago County had the lowest, at 0. The median was 2 and the figure for Iowa was 320. Source: National Highway Traffic Safety Administration.

Highest21Scott County

Lowest0Winnebago County

Median299 counties

Iowa320History

Top 40 counties, 2015

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	2015 count	Change on 2014
1	Scott County	21	+61.5%
2	Polk County	20	+5.3%
3	Pottawattamie County	13	-18.8%
3	Woodbury County	13	-7.1%
5	Benton County	11	+83.3%
5	Lee County	11	+266.7%
5	Warren County	11	+83.3%
8	Black Hawk County	10	+100%
9	Cerro Gordo County	7	+16.7%
9	Mahaska County	7	+250%
9	Webster County	7	+250%
12	Cass County	5	-16.7%
12	Cedar County	5	+150%
12	Hamilton County	5	+150%
12	Iowa County	5	+400%
12	Jasper County	5	0%
12	Johnson County	5	-37.5%
12	Linn County	5	-64.3%
12	Story County	5	0%
20	Boone County	4	-33.3%
20	Buchanan County	4	+300%
20	Crawford County	4	+100%
20	Dallas County	4	-33.3%
20	Des Moines County	4	+100%
20	Dickinson County	4	+100%
20	Dubuque County	4	-55.6%
20	Jackson County	4	+33.3%
20	Jones County	4	0%
20	Madison County	4	+100%
20	Marshall County	4	-20%
20	O'Brien County	4	n/a
20	Plymouth County	4	+300%
20	Tama County	4	+33.3%
34	Allamakee County	3	0%
34	Buena Vista County	3	-50%
34	Clayton County	3	+50%
34	Clinton County	3	-25%
34	Franklin County	3	n/a
34	Hardin County	3	+50%
34	Henry County	3	+50%
34	Monona County	3	+200%
34	Shelby County	3	+200%
34	Sioux County	3	+200%
34	Washington County	3	-25%
45	Appanoose County	2	0%
45	Cherokee County	2	0%
45	Davis County	2	+100%
45	Delaware County	2	+100%
45	Fayette County	2	-60%
45	Greene County	2	0%
45	Guthrie County	2	+100%
45	Hancock County	2	-33.3%
45	Harrison County	2	-33.3%
45	Howard County	2	n/a
45	Keokuk County	2	-50%
45	Kossuth County	2	-33.3%
45	Marion County	2	+100%
45	Mills County	2	-33.3%
45	Monroe County	2	+100%
45	Osceola County	2	-33.3%
45	Poweshiek County	2	-60%
45	Wapello County	2	0%
45	Winneshiek County	2	0%
45	Worth County	2	+100%
65	Adams County	1	-50%
65	Audubon County	1	0%
65	Bremer County	1	-66.7%
65	Butler County	1	0%
65	Calhoun County	1	-66.7%
65	Chickasaw County	1	-50%
65	Clay County	1	-80%
65	Emmet County	1	0%
65	Floyd County	1	-66.7%
65	Ida County	1	n/a
65	Jefferson County	1	0%
65	Louisa County	1	-80%
65	Mitchell County	1	-66.7%
65	Montgomery County	1	n/a
65	Muscatine County	1	0%
65	Page County	1	-50%
65	Sac County	1	-66.7%
65	Union County	1	n/a
65	Wayne County	1	n/a
65	Wright County	1	-75%
85	Adair County	0	-100%
85	Carroll County	0	-100%
85	Clarke County	0	n/a
85	Decatur County	0	-100%
85	Fremont County	0	-100%
85	Grundy County	0	-100%
85	Humboldt County	0	-100%
85	Lucas County	0	-100%
85	Lyon County	0	-100%
85	Palo Alto County	0	-100%
85	Pocahontas County	0	-100%
85	Ringgold County	0	n/a
85	Taylor County	0	n/a
85	Van Buren County	0	n/a
85	Winnebago County	0	-100%

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/2015/National/FARS2015NationalCSV.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, 2015) [Data set]. Retrieved October 12, 2026, from https://static.nhtsa.gov/nhtsa/downloads/FARS/2015/National/FARS2015NationalCSV.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, 2015. National Highway Traffic Safety Administration, 24 June 2026, https://static.nhtsa.gov/nhtsa/downloads/FARS/2015/National/FARS2015NationalCSV.zip. Invokely, https://invokely.ai/rankings/traffic-fatalities/iowa-counties?period=2015. 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, 2015. Dataset. Accessed October 12, 2026. https://static.nhtsa.gov/nhtsa/downloads/FARS/2015/National/FARS2015NationalCSV.zip. Also distributed by Invokely, https://invokely.ai/rankings/traffic-fatalities/iowa-counties?period=2015.

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, 2015 [Dataset]. Available at: https://static.nhtsa.gov/nhtsa/downloads/FARS/2015/National/FARS2015NationalCSV.zip, via Invokely: https://invokely.ai/rankings/traffic-fatalities/iowa-counties?period=2015 (Accessed: 12 October 2026).

BibTeX

@misc{national_counties_in_iowa_by_2015,
  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, 2015}},
  year = {2026},
  howpublished = {Data set},
  url = {https://static.nhtsa.gov/nhtsa/downloads/FARS/2015/National/FARS2015NationalCSV.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/traffic-fatalities/iowa-counties?period=2015. 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/2015/National/FARS2015NationalCSV.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, 2015
PY  - 2026
DA  - 2026/06/24
PB  - National Highway Traffic Safety Administration
DB  - Invokely
UR  - https://static.nhtsa.gov/nhtsa/downloads/FARS/2015/National/FARS2015NationalCSV.zip
L2  - https://invokely.ai/rankings/traffic-fatalities/iowa-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/traffic-fatalities/iowa-counties?period=2015.
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/2015/National/FARS2015NationalCSV.zip. Retrieved 2026-10-12.
ER  -

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Questions

Which county has the highest traffic fatalities?

Scott County, with 21 in 2015, according to National Highway Traffic Safety Administration.

Which county has the lowest traffic fatalities?

Winnebago County, with 0 in 2015.

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.