John Gillis
- Jack White
- John F. Gillis
- John Gillies (Australian politician)
- John Gillies (Canadian politician)
- John Gillies (artist and musician)
- John Gillies (botanist)
- John Gillies (doctor)
- John Gillies (footballer)
- John Gillies (historian)
- John Gillies (minister)
- John Gillis (historian)
- John Hugh Gillis
- John Joseph Alban Gillis
- John Lillie Gillies
- John P. Gillis
- Jon Gillies
- Otago Provincial Council