
That's a great question, and the answer is that it depends on the specific coin you have! The U.S. Mint created two different versions of the 1976 Bicentennial Kennedy half-dollar.
Most of the 1776-1976 dated half-dollars, the ones intended for everyday circulation, are not silver. These coins are made of a copper-nickel clad composition and were struck at the Philadelphia (no mint mark) and Denver ("D" mint mark) Mints.
However, the U.S. Mint also struck special collector's versions that do contain silver. These coins, made for official Uncirculated and Proof sets, have a 40% silver-clad composition. The easiest way to identify these silver versions is by looking for an "S" mint mark, which indicates they were produced at the San Francisco Mint. So, if your 1976 Kennedy half-dollar has an "S" on it, you have one of the silver ones


