The newest country in the world is South Sudan, which officially became a country on July 9, 2011. South Sudan was formed after a long civil war between the Sudanese government and the Sudan People’s Liberation Army. As a result of a peace agreement, South Sudan voted for independence in a referendum and became the world’s newest nation.
It is worth noting that countries can be created or dissolved for different reasons, and the newest country at a certain moment may change over time.