By the end of 2016, 3.3 million people from the world's newest country had fled their homes, more than half to neighbouring countries.
The United Nations said 65.6 million people were displaced from their homes because of conflict and persecution by the end of 2016, which is an increase of about 300,000 from 2015. Almost 750,000 people fled that fledgling country past year.
The UN hopes that recorded on Monday a record number of IDPs will force rich countries to think again on that not just to take more refugees, but also work to restore the world. Around four million Syrian refugees are living in other countries now. The total refugee population - people who fled their home countries - was about 22.5 million people, and almost half of those were children.
But UN High Commissioner for Refugees Filippo Grandi said it was still a disheartening failure of global diplomacy.
- Turkey hosts the largest number of refugees (2.9 million) followed by Pakistan (1.4 mln) and Lebanon (1 mln).
However, in 2016, South Sudan became "the biggest new factor" when peace efforts broke down in July resulting in some 737,400 people fleeing by the end of the year.
Syria is the only country in which a majority of the population is forcibly displaced.
But the UN Refugee Agency says this should not deter governments from taking concrete action today.
The agency's annual Global Trends report, a statistical assessment of refugees, asylum seekers and people forcibly displaced from their homes, reflected a worsening of conflict, mayhem and persecution. "We certainly have counted at least half a million more in the first semester of this year in terms of refugees".
- Developing regions host 84 percent of the world's refugees.
By population, Syria still accounts for the biggest numbers of displaced people overall, with 12 million people (almost two thirds of the population) either displaced internally or having fled overseas as refugees or asylum seekers. In total, 189,300 refugees were accepted for resettlement by 37 different countries.
Among its findings, the report noted that some 75,000 asylum claims were received from children travelling alone or separated from their parents.
"If there is no security, there is no point", Grandi said, after meeting and talking to displaced families at the protection of civilians site about their needs.
Relative to its population, Lebanon cares for the largest number of refugees with one in six, followed by Jordan with one in 11, and then Turkey where one in 28 people is a refugee.
It is a smaller increase than 2014-15, when the figure rose by five million, reports the BBC. In total, about 3.3 million South Sudanese had fled their homes by the end of 2016, in what has become the fastest-growing displacement of people in the world.