John Gillis

John Gillis or Gillies may refer to:
 * John Gillies (minister) (1712–1796), Church of Scotland minister and theological writer
 * John Gillies (historian) (1747–1836), Scottish historian
 * John Gillies (botanist) (1792–1834), Scottish naval surgeon, explorer and botanist
 * John P. Gillis (1803–1873), U.S. Navy officer
 * John Gillies (New Zealand politician) (1802–1871), New Zealand local politician (Otago Provincial Council) and church elder
 * John Lillie Gillies (1832–1897), New Zealand politician
 * John Gillies (Canadian politician) (1837–1889), Ontario farmer and political figure
 * John Gillies (Australian politician) (1844–1911), Scottish-born Australian politician
 * John F. Gillis (1846–1899), physician and political figure in Prince Edward Island
 * John Joseph Alban Gillis (1882–1965), physician and politician in British Columbia, Canada
 * John Hugh Gillis (1884–1913), Canadian track and field athlete
 * John Gillies (footballer) (1918–1991), Scottish footballer
 * John Gillies (doctor) (fl. 1970s–2010s), Scottish general practitioner
 * John Gillis (historian) (born 1939), professor of history at Rutgers University
 * John Gillies (artist and musician) (born 1960), Australian artist and musician
 * Jack White or John Gillis (born 1975), musician
 * Jon Gillies (born 1994), ice hockey player
 * John Gillis, vice-president, Nova Scotia Liberal Party, endorser of Scott Brison in the 2006 Liberal Party of Canada leadership convention