William Mack
William or Bill Mack may refer to:
- William Mack , Ontario businessman and political figure
- W.C. Mack, English organ builder
- William L. Mack, provincial level politician from Alberta, Canada
- William Mack , barrister and judge in Queensland, Australia
- William P. Mack, vice admiral in the United States Navy
- William B. Mack, American stage and film actor
- Bill Mack , American country music singer, songwriter, and radio host
- Bill Mack , American sculptor and painter
- Bill Mack , pitcher in Major League Baseball
- Bill Mack, winner of the mile at the 1952 USA Indoor Track and Field Championships
- Red Mack, American football player