William Gage
William Gage may refer to:
People
- William Gage (15th-century landowner)
- Sir William Gage, 2nd Baronet
- Sir William Gage, 7th Baronet, MP for Seaford from 1727 until his death
- William Gage, 2nd Viscount Gage, equerry to the Prince of Wales and Member of Parliament
- William Hall Gage, Second Sea Lord and Admiral of the Fleet in the British Navy
- William James Gage, Canadian publisher and philanthropist
- William J. Gage, American architect, designed Beverly Hills City Hall
- Sir William Gage (judge), UK Lord Justice of Appeal