The number of people put to death last year was the highest in 25 years, according to Amnesty International.
New figures show that the top five executioners in the world in 2015 were China, Iran, Pakistan and Saudi Arabia and the US.
Data for China is treated as a state secret, while Iran executed 977 people, Pakistan executed 320 and Saudi Arabia executed 158.
The only country in the top five to show progress was the US, which executed 28 people - the lowest number since 1991.
Just Over 1,600 people were executed in 2015, an increase of over 50 per cent on 2014.
Colm O'Gorman of Amnesty International has said although this is worrying, it is not all bad news: “So in 2015 four countries completely abolished the death penalty.
“So that means that the majority of the world has not banned what is undoubtedly one of the most horrendous punishments.
“The figures from last year do represent a bit of a short term set back but the long term trend is clear the world is moving away from the death penalty.”