We have:
Penny, which is one cent.
Nickle = 5 cents.
Dime = 10 cents.
Quarter = 25 cents.
Half dollar = 50 cents.
Dollar = 1 dollar.

I don't see many half or dollar coins in use, but you can get them from a bank if you want some. Mostly its just pennies, nickles, dimes and quarters.

This has more info and pictures:
https://en.wikipedia.org/wiki/Coins_of_the_United_States_dollar