| Bill Zwaan | |
| Birth Date: | 9 November 1954 |
| Player Sport1: | Football |
| Player Years2: | 1973–1975 |
| Player Team2: | Delaware |
| Player Positions: | Quarterback |
| Coach Sport1: | Football |
| Coach Years2: | 1977–1979 |
| Coach Team2: | Monsignor Bonner HS (PA) (OC) |
| Coach Years3: | 1980 |
| Coach Team3: | Cincinnati (assistant) |
| Coach Years4: | 1981–1985 |
| Coach Team4: | Merchant Marine |
| Coach Years5: | 1988 |
| Coach Team5: | Martin County HS (FL) (assistant) |
| Coach Years6: | 1989–1991 |
| Coach Team6: | Martin County HS (FL) |
| Coach Years7: | 1992–1996 |
| Coach Team7: | Widener (DC) |
| Coach Years8: | 1997–2002 |
| Coach Team8: | Widener |
| Coach Years9: | 2003–2023 |
| Coach Team9: | West Chester |
| Coach Sport10: | Baseball |
| Coach Years11: | 1983–1984 |
| Coach Team11: | Merchant Marine |
| Coach Years12: | 1993–1996 |
| Coach Team12: | Widener |
| Overall Record: | 217–90 (college football) 67–101–1 (college baseball) |
| Tournament Record: | Football 10–10 (NCAA D-II playoffs) 5–2 (NCAA D-III playoffs) |
| Championships: | Football 3 Middle Atlantic (2000–2002) 2 PSAC (2004, 2007) 4 PSAC East Division (2013, 2015, 2017–2018) |
Bill Zwaan Sr. (born November 9, 1954) in an American former college football and college baseball coach. He served as the head football coach at Widener University in Chester, Pennsylvania from 1997 to 2002 and West Chester University in West Chester, Pennsylvania from 2003 to 2023, compiling a career college football head coaching record of 217–90. Zwaan was also as the head baseball coach at the United States Merchant Marine Academy in Kings Point, New York from 1983 to 1984 and Widener from 1993 to 1996, amassing career college baseball head coaching record of 67–101–1.[1]