What Year Did the U.S. Stop Making Silver Dollars?

By GovMint :

The answer to when the U.S. stopped making silver dollars depends upon the definition of silver dollars that is being used. The production of 90% silver dollars for general circulation in the United States ceased in 1935, marking the end of an era for one of the most iconic coins in American numismatics. The U.S. Mint has continued to produce silver dollars after 1935, however, these later dollars were either not made from pure silver or were not made to be introduced into circulation for everyday transactions. Instead, these later issues are aimed at collectors and precious metal enthusiasts, serving as commemorative pieces or even as bullion issues. 

For example, the United States Mint issued Eisenhower Dollars in the 1970s, but these silver dollars were made of 40% silver and never widely circulated. Silver Eagles are also technically silver dollar coins, and while they are made from pure 99.9% fine silver, they do not enter circulation and are issued as bullion or collectible coins.

Sources Used:

Eisenhower Dollars (1971-1978) | Complete Coin Guide (eisenhowerdollarguide.com)