A 2025 ranking of the world's richest countries, based on GDP per capita in Purchasing Power Parity (PPP), highlights small, specialized states and large diversified economies. Liechtenstein leads with $201,112 PPP, followed by Singapore ($156,969) and Luxembourg ($152,394). Other top countries include Ireland, Qatar, and Norway, with their wealth driven by finance, energy, technology, or diversified industries. PPP adjusts for cost of living, reflecting actual purchasing power.