united_states | leadertitle | president_of_the_united_states <tsp> united_states | leadername | paul_ryan <tsp> 250_delaware_avenue | location | united_states <tsp> united_states | ethnicgroup | white_americans <sep> the united states of america (usa or usa), commonly known as the united states (us or us) or america, is a country primarily located in north america it consists of 50 states, a federal district, five major unincorporated territories, nine minor outlying islands, and 326 indian reservations the united states is the world's third-largest country by both land and total area 
in the united states. the leader of the country is called the president of the united states. one of the country's leaders is paul ryan and one of the ethic groups is white americans. also located in the u.s. is 250 delaware avenue.the united states is the world's third-largest country by both land and total area