Chapman was first elected as a councillor for the
Leith Walk ward in the
2007 City of Edinburgh Council election, becoming one of the three first Green councillors in Edinburgh. She was re-elected in
2012. Later that year she became the first ever convener of the council's Petitions Committee. During her time as a councillor, Chapman has advocated for causes that include: the
living wage,
participatory budgeting, better private tenancy rights, and better support for non-profits. She has also organised and voted against the privatisation of council services and cuts to services. In June 2015, she announced she was standing down as a councillor, to concentrate on the Scottish Parliament election that was to be held in May 2016. In November 2013, she was elected unopposed as the Scottish Greens' female co-convenor, succeeding Glasgow councillor
Martha Wardrop, and was re-elected to the position in 2016. Chapman was the party's lead candidate in the
2014 European Parliament election in the United Kingdom for the
Scotland constituency. She was not elected. Chapman is a
socialist,
environmentalist, anti-cuts activist, peace activist and
feminist. She has been active in a number of political campaigns, including the
Radical Independence Campaign. In September 2014, Chapman became a member of the
Smith Commission into further devolution for the
Scottish Parliament. In 2015, Chapman was challenged as co-convenor by activist Zara Kitson in the party's internal elections. Kitson was second on the party list for
Glasgow in the
2016 Scottish Parliament election and was nominated by former MSP
Mark Ruskell and endorsed by MSP and former convenor
Alison Johnstone. The election was notable as it was the first time an incumbent co-convenor faced a serious challenge, all to date had been re-elected as the sole nominees. Chapman stood in the
2016 Scottish Parliament election as the party's lead candidate for the North East region but despite the Greens increasing their number of MSPs from two to six, Chapman was not elected. In 2019, she was once again selected as the party's lead candidate for the
European Parliament election for the
Scotland constituency. She was not elected. At the
2019 Scottish Green leadership election, Chapman lost to
Lorna Slater.
Member of the Scottish Parliament In the
2021 Scottish Parliament election, Chapman led the North East regional list for the Scottish Greens. This made her the first Green MSP in the North East since
Shiona Baird lost her seat in 2007. Upon being sworn in, Chapman repeated her affirmation in
Shona. In 2023, Chapman was criticised for comments she made during a discussion on gender recognition reform with broadcaster
LBC. The MSP said she agreed with children as young as 8 being allowed to make their own decision about whether to legally change their gender. In July 2025, the Scottish Greens published their candidates for the regional lists at the
2026 Scottish Parliament election. For the North East Scotland region, Chapman was moved down to second place, effectively deselecting her. Guy Ingerson was chosen to be the lead Green candidate for the region. She was ultimately put first on the list again in March 2026 after Ingerson was barred from running. ==Rector==