Wilhelm Piec (born Wilhelm Pietz November 2, 1915 in Schwientochlowitz (Swietochlowice), German Empire, died on April 4, 1954, also in Swietochlowice) - Polish soccer forward player.
Wilhelm was one of the best players of interwar Poland.
Together with his older (and more famous) brother Ryszard Piec, they represented Naprzód Lipiny - a small team from a small hamlet of Lipiny, which never managed to qualify to the Polish Soccer League, but which played a significant role in interwar Polish soccer.
Piec represented Poland in 4 games.
He went to the 1938 FIFA World Cup in France, but did not play in the legendary Poland - Brazil game which ended 5-6 (June 5, 1938, Strasbourg).
During the war, he continued playing in Naprzód, which was forced to change its name to TuS Lipine.
After the war, in 1946-47, he played in AKS Chorzów.