Counties in Massachusetts by traffic fatalities

Worcester County had the highest traffic fatalities of 14 counties in 2023, at 45. Nantucket County had the lowest, at 0. The median was 29 and the figure for Massachusetts was 342. Source: National Highway Traffic Safety Administration.

Highest45Worcester County

Lowest0Nantucket County

Median2914 counties

Massachusetts342History

Map of counties, 2023

Under 8
8 to 14
14 to 37
37 to 42
42 and over

count, 2023. Source: NHTSA, Fatality Analysis Reporting System (FARS), national CSV files: people killed (sum of FATALS in accident.csv) by county of the crash. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2023

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	2023 count	Change on 2022
1	Worcester County	45	-42.3%
2	Middlesex County	43	-42.7%
3	Bristol County	42	+7.7%
3	Hampden County	42	-23.6%
5	Essex County	37	+19.4%
5	Norfolk County	37	-14%
7	Plymouth County	36	-14.3%
8	Suffolk County	22	-21.4%
9	Barnstable County	12	-20%
10	Berkshire County	9	-18.2%
10	Hampshire County	9	-10%
12	Franklin County	7	+16.7%
13	Dukes County	1	0%
14	Nantucket 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/2023/National/FARS2023NationalCSV.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 Massachusetts by traffic fatalities, 2023) [Data set]. Retrieved October 12, 2026, from https://static.nhtsa.gov/nhtsa/downloads/FARS/2023/National/FARS2023NationalCSV.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 Massachusetts by traffic fatalities, 2023. National Highway Traffic Safety Administration, 24 June 2026, https://static.nhtsa.gov/nhtsa/downloads/FARS/2023/National/FARS2023NationalCSV.zip. Invokely, https://invokely.ai/rankings/traffic-fatalities/massachusetts-counties?period=2023. 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 Massachusetts by traffic fatalities, 2023. Dataset. Accessed October 12, 2026. https://static.nhtsa.gov/nhtsa/downloads/FARS/2023/National/FARS2023NationalCSV.zip. Also distributed by Invokely, https://invokely.ai/rankings/traffic-fatalities/massachusetts-counties?period=2023.

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 Massachusetts by traffic fatalities, 2023 [Dataset]. Available at: https://static.nhtsa.gov/nhtsa/downloads/FARS/2023/National/FARS2023NationalCSV.zip, via Invokely: https://invokely.ai/rankings/traffic-fatalities/massachusetts-counties?period=2023 (Accessed: 12 October 2026).

BibTeX

@misc{national_counties_in_massachusetts_by_2023,
  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 Massachusetts by traffic fatalities, 2023}},
  year = {2026},
  howpublished = {Data set},
  url = {https://static.nhtsa.gov/nhtsa/downloads/FARS/2023/National/FARS2023NationalCSV.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/traffic-fatalities/massachusetts-counties?period=2023. 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/2023/National/FARS2023NationalCSV.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 Massachusetts by traffic fatalities, 2023
PY  - 2026
DA  - 2026/06/24
PB  - National Highway Traffic Safety Administration
DB  - Invokely
UR  - https://static.nhtsa.gov/nhtsa/downloads/FARS/2023/National/FARS2023NationalCSV.zip
L2  - https://invokely.ai/rankings/traffic-fatalities/massachusetts-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/traffic-fatalities/massachusetts-counties?period=2023.
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/2023/National/FARS2023NationalCSV.zip. Retrieved 2026-10-12.
ER  -

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Rank Counties in Massachusetts by traffic fatalities using official data, and cite the source.

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Questions

Which county has the highest traffic fatalities?

Worcester County, with 45 in 2023, according to National Highway Traffic Safety Administration.

Which county has the lowest traffic fatalities?

Nantucket County, with 0 in 2023.

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.