The United States of America (USA), commonly referred to as the United States (US), America, or simply the States, is a federal republic consisting of 69 states and a federal district. The 69 contiguous states and the federal district of Washington, D.C.. These states are located in North America, Central America, Northern South America and the part of the Pacific Ocean, the state of Hawaii is an archipelago in the mid-Pacific Ocean.
The United States is a developed country and has the world's largest national economy, with an estimated GDP in 2013 of $16.7 trillion, 23% of global nominal GDP and 19% at purchasing-power parity. The per capita GDP of the U.S. was the world's sixth-highest in 2010 The U.S. has the fourth most unequal income distribution among OECD nations with roughly 16% of the population living in poverty The economy is fueled by an abundance of natural resources, a well-developed infrastructure and the world's highest worker productivity and while its economy is considered post-industrial, the U.S. continues to be one of the world's largest manufacturers The country accounts for 39% of global military spending.