Greer stood as the Scottish Green candidate in the
East Dunbartonshire constituency in the
2015 general election, securing 5th place with 804 votes (1.5%). In March 2015, the Scottish Greens announced Greer had been selected as the lead candidate for their
West Scotland regional list, following a ballot of their members.
Member of the Scottish Parliament Ahead of the
2016 Scottish Parliament election, Greer was critical that the general level of engagement with 16 and 17-year-olds as first-time voters had been below what was seen in the referendum. On 6 May 2016, he was elected with 17,218 votes (5.3%) as an additional member for the West Scotland region. Elected at the age of 21 years old, he became Scotland's youngest MSP. Before Greer was elected, the youngest MSP had previously been Labour's
Mark Griffin, who was 25 years old when he was first elected in
2011. Like his Green colleagues, Greer is opposed to an
independent Scotland joining
NATO. He told the
Daily Record: NATO is a 'first strike' nuclear alliance, meaning it claims the right to launch its weapons of mass slaughter against other countries without having been attacked first. There can never, ever be justification for murdering millions of innocent people like that. For this reason alone, never mind NATO's history of provoking rather than avoiding conflict, the Scottish Greens are clear that an independent Scotland should follow Ireland's lead and stay out. Instead, we should immediately sign the Treaty on the Prohibition of Nuclear Weapons, which would not only make the
Trident submarines at
Faslane illegal and force their removal, it would also show that we refuse to let others use weapons of mass destruction on our behalf.In 2019, Greer was strongly criticised for having posted a tweet, while a secondary school student, in June 2012 which read "I'm not exaggerating when I say nothing would thrill me more than for
Buckingham Palace to burn to the ground." On 25 January 2019, Greer posted a tweet calling
Winston Churchill "a
white supremacist mass murderer." He later appeared on
Good Morning Britain and
Politics Live and was challenged on his views. A few years earlier, Greer had been criticised in
The Sun after tweeting that "Imperial Britain was happy to live with
Hitler" in reference to the policy of
Appeasement. Greer is gay and Christian, and opposed the appointment of
Kate Forbes as
Deputy First Minister of Scotland due to her conservative stance on LGBT rights.
Scottish Green co-leadership In July 2025, Greer announced he was running for
Co-leadership of the Scottish Greens. During the campaign, he claimed to have been hospitalised twice due to "bullying" within the party. On August 29, 2025, the party announced that Greer had won the leadership contest, along with his fellow MSP
Gillian Mackay. == Personal life ==