In Germany, which vastly expanded its acceptance of people fleeing war from places like Syria, the number of refugees doubled to over 600,000 past year.
More than 737,000 people fled the conflict in South Sudan past year.
There were another 2.8 million asylum seekers, the report said.
This figure includes refugee numbers and people displaced in their own countries.
In contrast, almost of all of the South Sudanese refugees have sought protection in neighbouring countries such as Uganda, Ethiopia and Sudan.
In 2016, 22.5 million refugees fled their home country - the highest number since the agency was founded in 1950.
Filippo Grandi, High Commissioner for Refugees said, "It is an extremely moveable situation, an extremely dynamic situation, which reflects in turn conflicts that continue to affect mostly and primarily and very violently civilians".
South Korea to scrap building new nuclear power plants
In addition to phasing out the country's use of nuclear energy, Moon has also pledged to reduce South Korea's use of coal-fired power generation.
More than four million South Sudanese have been internally displaced and another two million have fled the country as refugees because of the four-year-old civil war.
Syria's neighbours Turkey and Lebanon have taken in some 2.9 million and 1 million people, respectively, while Pakistan hosts 1.4 million mostly Afghan refugees.
In 2016, 10.3 million were newly displaced, an equivalent of one person every three seconds.
Musa Ecweru, minister for refugees, told Anadolu Agency: "We want the worldwide community to lift the pressure and fix the damage the refugees are putting on the limited resources in the communities that host them".
"We're talking about people who are used to going through shocks and stresses, but they've just exhausted their coping mechanisms". More than six million people - half of South Sudan's population - are in need of urgent aid and humanitarian organizations expect the number to rise by 20 to 30 percent in 2017. Syria, Iraq, and the still very significant displacement inside Colombia were the biggest internal displacement situations, nonetheless the problem of internal displacement is a worldwide one and accounts for nearly two thirds of the global forced displacement total.
"We're obviously concerned about the constant flow of South Sudanese refugees going to neighbouring countries".
The number of people forced to flee has increased with more than 50% over the last five years, up from 42.3 million in 2012.
At least 10 million people are estimated to be stateless, the United Nations report found.
About 84 per cent of the people were in low- or middle-income countries as of end 2016. The report attributed that slight reduction in part to people who had returned to their homes, offsetting the number of new people who had fled.