Which has higher terrorist attacks by severity, United States or Yemen?

United States, at 0 attacks against 0 attacks in Yemen as of 2021.

What is the difference in terrorist attacks by severity between United States and Yemen?

0 attacks, with United States ahead.

How many years of comparable data are there for United States and Yemen?

51 years are reported by both, from 1970 to 2021.

Where does this data come from?

National Consortium for the Study of Terrorism and Responses to Terrorism (START) (2022) – with major processing by Our World in Data, published as Terrorist attacks by severity. Statizoid refreshes it automatically from the source and publishes the full history for both places.

United States vs Yemen: Terrorist attacks by severity

United States

0 attacks

in 2021

Yemen

0 attacks

in 2021

United States rank

1st

Yemen rank

1st

Terrorist attacks by severity over time

United States
Yemen

How they compare

United States currently reports 0 attacks against 0 attacks in Yemen, a difference of 0 attacks.

The two have swapped places 4 times across 51 shared years of data; in 1970 it was Yemen ahead.

United States ranks 1st and Yemen ranks 1st of 187 countries.

Across the 6 decades both report, United States averaged higher in 2 and Yemen in 2.

Head to head by decade

Decade	United States	Yemen	Difference	Ahead
1970s	0 attacks	0 attacks	0 attacks	—
1980s	0 attacks	0 attacks	0 attacks	—
1990s	0.1111 attacks	0 attacks	0.1111 attacks	United States
2000s	0.3 attacks	0 attacks	0.3 attacks	United States
2010s	0 attacks	0.3 attacks	0.3 attacks	Yemen
2020s	0 attacks	0.5 attacks	0.5 attacks	Yemen

Averages of every year both report within each decade.

Frequently asked questions

Which has higher terrorist attacks by severity, United States or Yemen?: United States, at 0 attacks against 0 attacks in Yemen as of 2021.
What is the difference in terrorist attacks by severity between United States and Yemen?: 0 attacks, with United States ahead.
How many years of comparable data are there for United States and Yemen?: 51 years are reported by both, from 1970 to 2021.
How do United States and Yemen rank globally for terrorist attacks by severity?: United States ranks 1st and Yemen ranks 1st of 187 countries.
Where does this data come from?: National Consortium for the Study of Terrorism and Responses to Terrorism (START) (2022) – with major processing by Our World in Data, published as Terrorist attacks by severity. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Individual pages

About this data

Indicator: Terrorist attacks by severity
Unit: attacks
Source: National Consortium for the Study of Terrorism and Responses to Terrorism (START) (2022) – with major processing by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 188 places, 9,021 data points, 1970–2021
Last refreshed: 07 August 2026

Number of terrorist attacks with more than 100 deaths.