Which country is the smallest sovereign state whose official language is Latin?

Vatican City is the smallest sovereign state whose official language is Latin.

Latin is the official language of Vatican City, while Italian is used extensively in everyday administration and communication. The state’s linguistic arrangement reflects its role as the territorial centre of the Holy See and the Roman Catholic Church.

Latin remains especially important for official documents, church law, papal and curial texts, and inscriptions. The Vatican’s official newspaper, L’Osservatore Romano, publishes in Italian and other languages, while the Holy See’s formal diplomatic and ecclesiastical traditions retain Latin.

A common confusion is to treat the Holy See and Vatican City as identical. The Holy See is the central governing authority of the Catholic Church and maintains diplomatic relations; Vatican City is the sovereign territory created in 1929 to support its independence. Latin is associated with both, but the question asks about the state.