The United States has produced several coins and banknotes of its dollar which no longer circulate or have been disused.
Many of these were removed for specific reasons such as inflation reducing their value, a lack of demand, or being too similar to another denomination.
The United States also issued fractional currency for a brief time in the 1860s and 1870s, in several denominations each less than a dollar.
There have been numerous coins throughout the United States dollar's history that no longer circulate.
Note that this table shows the latest status before the coin denomination was rendered obsolete.