The economy of the United Kingdom is a highly developed social market economy. It is the sixth-largest national economy in the world measured by nominal gross domestic product (GDP), Tenth-largest by purchasing power parity (PPP), and twenty-first by nominal GDP per capita, constituting 3.1% of nominal world GDP. The United Kingdom constitutes 2.3% of world GDP by purchasing power parity (PPP).

The economy of Wales is part of the wider economy of the United Kingdom, and encompasses the production and consumption of goods, services and the supply of money in Wales.