John Minto is a New Zealand political activist known for his involvement in various left-wing groups and causes, most notably Halt All Racist Tours. A 2005 documentary on New Zealand's Top 100 History Makers listed him as number 89. As of 2011, he is involved with the protest group Global Peace and Justice Auckland and the Unite Union. He also wrote a weekly column for The Press and was formerly editor of the Workers' Charter newspaper.

Halt All Racist Tours (HART) was a protest group set up in New Zealand in 1969 to protest against rugby union tours to and from South Africa. Founding member Trevor Richards served as president for its first 10 years, with fellow founding member John Minto then serving as president until South Africa dismantled apartheid in the early 1990s.