| William McAvoy | |
| Birth Date: | 16 October 1884 |
| Birth Place: | Hazleton, Pennsylvania, U.S. |
| Death Place: | Burlington County, New Jersey, U.S. |
| Player Sport1: | Football |
| Player Years2: | 1902–1903 |
| Player Team2: | Bloomsburg Normal |
| Player Years3: | 1904–1906 |
| Player Team3: | Lafayette |
| Player Sport4: | Baseball |
| Player Years5: | 1903–1904 |
| Player Team5: | Bloomsburg Normal |
| Player Years6: | 1905–1907 |
| Player Team6: | Lafayette |
| Player Years7: | 1908 |
| Player Team7: | Rochester Bronchos |
| Player Years8: | 1909 |
| Player Team8: | Syracuse Stars |
| Player Years9: | 1910 |
| Player Team9: | Reading Pretzels |
| Player Years10: | 1910 |
| Player Team10: | Northampton Meadowlarks |
| Player Positions: | Fullback (football) Left fielder (baseball) |
| Coach Sport1: | Football |
| Coach Years2: | 1908–1916 |
| Coach Team2: | Delaware |
| Coach Years3: | 1920–1921 |
| Coach Team3: | Drexel |
| Coach Years4: | 1922–1924 |
| Coach Team4: | Delaware |
| Coach Years5: | 1925–1927 |
| Coach Team5: | Vermont |
| Coach Sport6: | Basketball |
| Coach Years7: | 1909–1918 |
| Coach Team7: | Delaware |
| Coach Years8: | 1919–1920 |
| Coach Team8: | Lafayette |
| Coach Years9: | 1920–1922 |
| Coach Team9: | Drexel |
| Coach Years10: | 1922–1925 |
| Coach Team10: | Delaware |
| Coach Years11: | 1925–1928 |
| Coach Team11: | Vermont |
| Coach Years12: | 1928–1929 |
| Coach Team12: | Haverford |
| Coach Sport13: | Baseball |
| Coach Years14: | 1909–1914 |
| Coach Team14: | Delaware |
| Coach Years15: | 1923–1925 |
| Coach Team15: | Delaware |
| Admin Years1: | 1908–1917 |
| Admin Team1: | Delaware |
| Admin Years2: | 1922–1925 |
| Admin Team2: | Delaware |
| Overall Record: | 52–70–14 (football) 108–137 (basketball) 36–77–3 (baseball) |
William James McAvoy (October 16, 1884 – September 17, 1956) was an American football, basketball, and baseball coach. He served as the head football coach at the University of Delaware (1908–1916, 1922–1924), Drexel University (1920–1921), and the University of Vermont (1925–1927), compiling a career college football head coaching record of 52–70–14.
A native of Hazleton, Pennsylvania, McAvoy attended Lafayette College, where he played football as a fullback and baseball as a left fielder. In the fall of 1906, he was elected captain of the 1907 Lafayette football team, but did not return to school the following year, instead going into business.[1] [2] In 1908, he played as a left fielder for the Rochester Bronchos of the Eastern League.[3]