U.S. coin denominations used in the past were the half-cent, two-cent, three-cent, and 20-cent pieces, as well as a small silver coin called a half-dime. Gold coins in denominations of $1, $2.50 ("Quarter Eagle"), $3, $5 ("Half Eagle"), $10 ("Eagle"), and $20 ("Double Eagle") were used from 1795 until 1933.
Source: Federal Reserve Bank of Atlanta