Thomas Cahill, American soccer player and coach (b. 1864)
Thomas W. Cahill (December 25, 1864 — September 29, 1951) was one of the founding fathers of soccer in the United States, and is considered the most important administrator in U.S. Soccer before World War II.

Cahill formed the United States Football Association in 1913, which later became the United States Soccer Federation. In 1916 he became the first coach of the United States men's national soccer team. Cahill was enshrined in the U.S. National Soccer Hall of Fame in 1950.