Which is the smallest UN member state by total area?

Monaco is the smallest United Nations member state by total area, covering about 2.02 square kilometres.

The principality lies on the Mediterranean coast of southern Europe and is surrounded on three sides by France. It is a constitutional monarchy headed by the Prince of Monaco, and its compact territory is divided into urban administrative areas rather than broad rural regions.

Monaco joined the United Nations on 28 May 1993. The distinction in this question matters because Vatican City is smaller than Monaco but is not a full UN member state; the Holy See holds permanent observer status instead.

Monaco’s small territory has been expanded through land reclamation, including the Fontvieille district. It is internationally known for finance, tourism and the Monaco Grand Prix. San Marino and Malta are also European microstates, but both have larger territories and are full UN members.