Which has higher terrorist attacks by method, Sierra Leone or Tanzania?

Sierra Leone, at 0 attacks against 0 attacks in Tanzania as of 2021.

What is the difference in terrorist attacks by method between Sierra Leone and Tanzania?

0 attacks, with Sierra Leone ahead.

How many years of comparable data are there for Sierra Leone and Tanzania?

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 method. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Sierra Leone vs Tanzania: Terrorist attacks by method

Sierra Leone

0 attacks

in 2021

Tanzania

0 attacks

in 2021

Sierra Leone rank

25th

Tanzania rank

25th

Terrorist attacks by method over time

Sierra Leone
Tanzania

How they compare

Sierra Leone currently reports 0 attacks against 0 attacks in Tanzania, a difference of 0 attacks.

The two have swapped places 6 times across 51 shared years of data; in 1970 it was Tanzania ahead.

Sierra Leone ranks 25th and Tanzania ranks 25th of 188 countries.

Across the 6 decades both report, Sierra Leone averaged higher in 2 and Tanzania in 1.

Head to head by decade

Decade	Sierra Leone	Tanzania	Difference	Ahead
1970s	0 attacks	0 attacks	0 attacks	—
1980s	0 attacks	0 attacks	0 attacks	—
1990s	0.4444 attacks	0 attacks	0.4444 attacks	Sierra Leone
2000s	0.5 attacks	0 attacks	0.5 attacks	Sierra Leone
2010s	0.1 attacks	0.1 attacks	0 attacks	—
2020s	0 attacks	1 attacks	1 attacks	Tanzania

Averages of every year both report within each decade.

Frequently asked questions

Which has higher terrorist attacks by method, Sierra Leone or Tanzania?: Sierra Leone, at 0 attacks against 0 attacks in Tanzania as of 2021.
What is the difference in terrorist attacks by method between Sierra Leone and Tanzania?: 0 attacks, with Sierra Leone ahead.
How many years of comparable data are there for Sierra Leone and Tanzania?: 51 years are reported by both, from 1970 to 2021.
How do Sierra Leone and Tanzania rank globally for terrorist attacks by method?: Sierra Leone ranks 25th and Tanzania ranks 25th of 188 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 method. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Sierra Leone vs Tanzania: Terrorist attacks by method. Statizoid, drawing on National Consortium for the Study of Terrorism and Responses to Terrorism (START) (2022) – with major processing by Our World in Data. Retrieved 23 September 2026, from https://reference.statizoid.com/compare/terrorist-attacks-by-method/sierra-leone/tanzania/

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<a href="https://reference.statizoid.com/compare/terrorist-attacks-by-method/sierra-leone/tanzania/">Sierra Leone vs Tanzania: Terrorist attacks by method</a> — Statizoid

About this data

Indicator: Terrorist attacks by method
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: 18 September 2026

Number of terrorist attacks of unknown type.