Which country is the world's most populous officially Francophone country?

Which country is the world's most populous officially Francophone country? The Democratic Republic of the Congo is the answer.

The DRC has a population exceeding 100 million, making it more populous than France, Canada or Madagascar. French is the country's sole official language and is used in national administration, education, courts and formal public life. It serves as a common administrative language across a country with hundreds of Indigenous languages.

French is not the everyday first language of most Congolese people. Lingala, Swahili, Kikongo and Tshiluba are among the major national languages, and language use varies sharply by region. Kinshasa, the capital, is one of the world's largest predominantly French-speaking urban centres, helping give the DRC an outsized role in the Francophone world.

The phrase “most populous Francophone country” can sometimes mean the country with the most French speakers rather than the country where French is official. Either formulation commonly points to the DRC in modern rankings, but the number of French speakers depends on whether researchers count fluency, regular use or basic ability. The quiz's “officially” wording makes the comparison especially clear.