China killed "thousands" of people a year ago, said the human rights group, based on examinations of court records and news reports.
According to report, China executed more people in 2016 than all other nations combined.
Belarus, Botswana, Nigeria and authorities within the State of Palestine resumed executions in 2016; Chad, India, Jordan, Oman and United Arab Emirates - all countries that executed people in 2015 - did not report any executions past year.
The use of the death penalty in the USA completely undermines our supposed position as a human rights leader.
Which countries still have the death penalty? "Nobody executes so quickly", said Amnesty International's regional director for East Asia, Nicholas Bequelin.
Yet by the end of this month, the U.S.is poised to outpace the total number of executions it carried out during the same period past year. However it flags a lack of understanding internationally as to how the law is applied in such cases as a concern.
"If we look at the top five around the world, we know that China is the standout one, so this is the one that executes by the thousands", Amnesty International's Rose Kulak told the ABC's PM program. While they didn't carry out any executions, Malawi, Zambia and Zimbabwe continued to hand down death sentences.
"The Chinese government itself has said it's going to be transparent, and based on [its] principle of complete openness, if it wants people to take it seriously it should [be transparent]", Mr Nee said.
Father Chris Ponnet, leader of the St. Camillus Center in Los Angeles, speaks during a rally protesting against the death penalty and in favor of immigration reform, organized by "Catholics Against the Death Penalty-Southern California" during the four-day 2017 Religious Education Congress in Anaheim, California, February 25, 2017.
China keeps its grim title as the world's top executioner, with Amnesty International tracking thousands of deaths in 2016 (though the exact figure remains a state secret).
In all, 20 were executed in the country - the lowest number since 1991, half the rate of 2007 and a third of 1997.
Another 2,832 people are still on death row in the US.
For example, there were fewer reported executions worldwide, and fewer countries carried out executions, compared to 2015.
In comparison, Pakistan recorded a significant dip of 73 per cent in the number of executions.
Belarus was singled out in the report as the only country in Europe that carried out the death penalty during 2016, with a total of at least four executions in murder cases.
However, the biggest rebuke is directed at China for its execution record and failure to disclose the true nature of capital punishments in the country.
The US is no longer among the world's top five executioners for the first time since 2006.
James Clark, a death penalty expert for Amnesty International, said the dip in executions can be attributed to a decrease in its use across the entire justice system as jurisdictions see the costliness of capital punishment and its inability to deter crime. Still, 2016 marked the eighth consecutive year in which the country was unique in the Americas for executing prisoners.