The most recent country to be formed in the world is called the Republic of South Sudan. It was formed on July 9, 2011.
Before July, South Sudan was part of Sudan, a country in the north-east of Africa. (Sudan itself used to be part of Egypt, but became independent in 1956.)
South Sudan was formed following two civil wars, one in the 1970s and—following an 11-year ceasefire—another which began in the 80s. The southern part of Sudan demanded independence.
When the new country’s independence was declared, its citizens took to the streets of Juba, the capital, to celebrate.
Salva Kiir Mayardit (pictured here) is the president of the new country, which has 10 states.