United States of America – United States of America's capital is Washington DC

(Pronounced yoo-nayh-tid steites ov uh-mer-i-kuh and wosh-ing-tuhn DC)

To remember the capital of the United States of America, use the following mnemonic:

They united the states of America (United States of America) by having a nationwide event washing tons of clothes while drinking Diet Coke (Washington DC).