Data / Rankings / Traffic fatalities / Counties in Iowa

Counties in Iowa by traffic fatalities, 2024

Polk County had the highest traffic fatalities of 99 counties in 2024, at 47. Taylor County had the lowest, at 0. The median was 2 and the figure for Iowa was 356. Source: National Highway Traffic Safety Administration.

Highest47Polk County
Lowest0Taylor County
Median299 counties
Iowa356History

Top 40 counties, 2024

Polk County: 47 countPolk County47Scott County: 23 countScott County23Linn County: 18 countLinn County18Black Hawk County: 15 countBlack Hawk County15Dubuque County: 11 countDubuque County11Woodbury County: 11 countWoodbury County11Muscatine County: 9 countMuscatine County9Pottawattamie County: 9 countPottawattamie County9Johnson County: 8 countJohnson County8Washington County: 8 countWashington County8Cerro Gordo County: 7 countCerro Gordo County7Clinton County: 7 countClinton County7Iowa County: 6 countIowa County6Plymouth County: 6 countPlymouth County6Jones County: 5 countJones County5Benton County: 4 countBenton County4Carroll County: 4 countCarroll County4Cedar County: 4 countCedar County4Greene County: 4 countGreene County4Hardin County: 4 countHardin County4Jasper County: 4 countJasper County4Lee County: 4 countLee County4Marion County: 4 countMarion County4Marshall County: 4 countMarshall County4Poweshiek County: 4 countPoweshiek County4Story County: 4 countStory County4Wapello County: 4 countWapello County4Warren County: 4 countWarren County4Webster County: 4 countWebster County4Worth County: 4 countWorth County4Boone County: 3 countBoone County3Buena Vista County: 3 countBuena Vista County3Decatur County: 3 countDecatur County3Des Moines County: 3 countDes Moines County3Fayette County: 3 countFayette County3Hamilton County: 3 countHamilton County3Henry County: 3 countHenry County3Humboldt County: 3 countHumboldt County3Jackson County: 3 countJackson County3Kossuth County: 3 countKossuth County3
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

RankCounties2024
count		Change on 2023
1Polk County Provisional47+20.5%
2Scott County Provisional23+43.8%
3Linn County Provisional18-33.3%
4Black Hawk County Provisional15+15.4%
5Dubuque County Provisional11+175%
5Woodbury County Provisional11+22.2%
7Muscatine County Provisional9+125%
7Pottawattamie County Provisional9-30.8%
9Johnson County Provisional8-20%
9Washington County Provisional8+300%
11Cerro Gordo County Provisional7+600%
11Clinton County Provisional7+40%
13Iowa County Provisional6+20%
13Plymouth County Provisional6+20%
15Jones County Provisional5+66.7%
16Benton County Provisional4+100%
16Carroll County Provisional4+33.3%
16Cedar County Provisional4-20%
16Greene County Provisional4-20%
16Hardin County Provisional4n/a
16Jasper County Provisional4-42.9%
16Lee County Provisional4-20%
16Marion County Provisional4+100%
16Marshall County Provisional4-42.9%
16Poweshiek County Provisional4-20%
16Story County Provisional40%
16Wapello County Provisional40%
16Warren County Provisional40%
16Webster County Provisional4-50%
16Worth County Provisional4n/a
31Boone County Provisional3-57.1%
31Buena Vista County Provisional30%
31Decatur County Provisional3-25%
31Des Moines County Provisional3+200%
31Fayette County Provisional3+50%
31Hamilton County Provisional3+50%
31Henry County Provisional3+200%
31Humboldt County Provisional3+200%
31Jackson County Provisional3+200%
31Kossuth County Provisional3+200%
31Madison County Provisional3-25%
31Mills County Provisional3+200%
31Sac County Provisional3+200%
31Sioux County Provisional3-50%
31Wayne County Provisional3n/a
31Winnebago County Provisional3n/a
47Allamakee County Provisional2-33.3%
47Butler County Provisional20%
47Clay County Provisional2+100%
47Clayton County Provisional2-33.3%
47Crawford County Provisional2-33.3%
47Dallas County Provisional2-85.7%
47Delaware County Provisional20%
47Dickinson County Provisional2+100%
47Fremont County Provisional2-60%
47Guthrie County Provisional2+100%
47Hancock County Provisional2+100%
47Lyon County Provisional2+100%
47Mahaska County Provisional2-50%
47O'Brien County Provisional2n/a
47Shelby County Provisional2+100%
47Tama County Provisional2n/a
47Van Buren County Provisional2n/a
47Winneshiek County Provisional2-60%
65Audubon County Provisional10%
65Buchanan County Provisional1-50%
65Calhoun County Provisional1n/a
65Cass County Provisional1-80%
65Chickasaw County Provisional1-50%
65Clarke County Provisional1-66.7%
65Davis County Provisional1-75%
65Floyd County Provisional1-80%
65Franklin County Provisional1-66.7%
65Ida County Provisional1-50%
65Jefferson County Provisional10%
65Keokuk County Provisional1-75%
65Lucas County Provisional10%
65Mitchell County Provisional1-50%
65Monona County Provisional10%
65Monroe County Provisional1-50%
65Montgomery County Provisional1-50%
65Page County Provisional1-75%
65Palo Alto County Provisional1n/a
65Ringgold County Provisional1-50%
65Union County Provisional1-83.3%
65Wright County Provisional1-66.7%
87Adair County Provisional0n/a
87Adams County Provisional0n/a
87Appanoose County Provisional0-100%
87Bremer County Provisional0-100%
87Cherokee County Provisional0-100%
87Emmet County Provisional0-100%
87Grundy County Provisional0-100%
87Harrison County Provisional0-100%
87Howard County Provisional0n/a
87Louisa County Provisional0-100%
87Osceola County Provisional0-100%
87Pocahontas County Provisional0n/a
87Taylor County Provisional0-100%

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/2024/National/FARS2024NationalCSV.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, 2024) [Data set]. Retrieved October 12, 2026, from https://static.nhtsa.gov/nhtsa/downloads/FARS/2024/National/FARS2024NationalCSV.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, 2024. National Highway Traffic Safety Administration, 24 June 2026, https://static.nhtsa.gov/nhtsa/downloads/FARS/2024/National/FARS2024NationalCSV.zip. Invokely, https://invokely.ai/rankings/traffic-fatalities/iowa-counties. 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, 2024. Dataset. Accessed October 12, 2026. https://static.nhtsa.gov/nhtsa/downloads/FARS/2024/National/FARS2024NationalCSV.zip. Also distributed by Invokely, https://invokely.ai/rankings/traffic-fatalities/iowa-counties.

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, 2024 [Dataset]. Available at: https://static.nhtsa.gov/nhtsa/downloads/FARS/2024/National/FARS2024NationalCSV.zip, via Invokely: https://invokely.ai/rankings/traffic-fatalities/iowa-counties (Accessed: 12 October 2026).

BibTeX
@misc{national_counties_in_iowa_by_2024,
  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, 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://static.nhtsa.gov/nhtsa/downloads/FARS/2024/National/FARS2024NationalCSV.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/traffic-fatalities/iowa-counties. 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/2024/National/FARS2024NationalCSV.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, 2024
PY  - 2026
DA  - 2026/06/24
PB  - National Highway Traffic Safety Administration
DB  - Invokely
UR  - https://static.nhtsa.gov/nhtsa/downloads/FARS/2024/National/FARS2024NationalCSV.zip
L2  - https://invokely.ai/rankings/traffic-fatalities/iowa-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/traffic-fatalities/iowa-counties.
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/2024/National/FARS2024NationalCSV.zip. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest traffic fatalities?

Polk County, with 47 in 2024, according to National Highway Traffic Safety Administration.

Which county has the lowest traffic fatalities?

Taylor County, with 0 in 2024.

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.

Traffic fatalities: other rankings

Counties in Iowa: more rankings