What is the currency of the US?

The U.S. Dollar (symbol: $, code: USD), subdivided into 100 cents, symbol ¢

MoreCurrent US Coins are

1¢ (name - cent; nickname - penny)

5¢ (nickname - nickel)

10¢ (dime)

25¢ (quarter)

50¢ (half dollar, or just half)

$1 (dollar)

Bills are

$1 - green and black

$2 - green and black, not commonly used

$5 - gray and purple

$10 - red and orange

$20 - blue, green, and peach

$50 - red, white, and blue

$100 - green and black, soon to be replaced with teal blue and brown
United States Dollar (USD)