James Halliday

• James Halliday (Canadian politician), represented Bruce North in the Canadian House of Commons from 1901 to 1904
• James Halliday (weightlifter), British weightlifter
• James Halliday (writer), Australian wine critic and writer
• Jimmy Halliday, leader of the Scottish National Party 1956–1960
• James Halliday, a deceased character in the novel, ''Ready Player One''