The value of a 1971 half dollar can vary depending on its condition, mint marks, and any mint errors. In average circulated condition, a 1971 half dollar is typically worth its face value of 50 cents. However, if the coin is in excellent condition or has certain rare characteristics, it could be worth more to collectors.

The most valuable Kennedy Half Dollars are 1964 Kennedy Half Dollar (Accented Hair variety), 1964 Kennedy Half Dollar (90% silver), 1965–1970 Kennedy Half Dollars (40% silver), 1970-D Kennedy Half Dollar, 1974-D Double Die Obverse, and 1998-S Matte Finish Silver Kennedy Half Dollar.

Starting in 1971, Kennedy Half Dollars were made with a copper-nickel clad composition (outer layers of copper-nickel over a copper core) and contain no silver. Meanwhile, a few 1971 half dollars were mistakenly struck on leftover 40% silver planchets, making them rare errors.