When did silver dollars stop being produced?

The first U.S. silver $1 coins were made in 1794, and the last ones were struck for circulation in 1935.

Because demand fluctuated the denomination wasn't struck every year. For example, dollars weren't made between 1804 and 1835, and between 1905 and 1920.

A trial run of about 300,000 new silver dollars was made in 1964 but the rising price of silver meant they were actually worth (much) more than a dollar, so the Mint melted them before any were released.

When the denomination was finally re-introduced in 1971 the coins were made of copper-nickel, the same as dimes and quarters. In 2000 the composition was changed to the current "golden" manganese brass.