Guri Melby (born 3 February 1981) is a Norwegian politician for the Liberal Party. She has served as the party leader since 2020 and Minister of Education from 2020 to 2021. She is also a member of parliament for Oslo since 2021, having previously been a deputy member for the same constituency between 2013 and 2021. Locally, she has also served as Oslo's City Commissioner for Transport and the Environment between 2013 and 2015.

She was born in Orkdal Municipality in Sør-Trøndelag county to Terje and Berit Melby, a bank clerk and school assistant. Currently, she is married to Thomas Hansen and has three children. The couple separated in 2020 before they got back together again in early November 2024.

From 1999 to 2006 she was a member of the municipal council of Orkdal Municipality, and a member of the municipal council of Trondheim Municipality from 2007 to 2011. She was Venstre's top candidate in Sør-Trøndelag county in the elections for the Storting on 14 September 2009.

She was a deputy member of the Storting from Oslo for the terms 2013–2017 and 2017–2021. When Trine Skei Grande was appointed to Solberg's Cabinet in 2018, Melby moved up to full representative, which she was until Grande resumed her duties in 2020. Melby was elected a regular representative in the 2021 election. In addition, she joined the Standing Committee on Foreign Affairs and Defence, also becoming its second vice chair.

In 2019, she and Petter Eide from the Socialist Left Party, demonstrated at Eidsvolls plass during the Norwegian reception of Li Zhanshu, the chairman of the National People's Congress's Standing Committee. Melby and Eide were asked to take off their yellow T-shirts with the inscription "freedom" in Norwegian and Mandarin before they could enter the Storting. Melby stated afterwards that it was "at best naive of the Storting to accept that our democratic rules are deceived by a manipulative system, at worst we have allowed ourselves to be dictated, and that is even worse".

From October 2013 to 2015, she served as the Oslo city commissioner for public transport and environmental affairs. She took over from Ola Elvestuen, who had been elected to Parliament following the 2013 parliamentary election. She was succeeded by Lan Marie Nguyen Berg after the coalition was defeated following the 2015 local elections.

Following Trine Skei Grande's decision to resign as minister and party leader in March 2020, Melby was asked by Grande personally if she wanted to succeed her as minister. She expressed sorrow by Grande's resignation, saying that "being education minister was her dream job". Her appointment also coincided with the lockdown and closing of schools in Norway due to the COVID-19 pandemic.

In January 2021, she went against professional advice to exclude homeschool for students, despite the infection level being at yellow. She was criticised by many educational experts for her decision, but she defended it by saying that it would be up to the schools respectively to decide and notify their county governor about it. She was however supported by the lecturer team, the Education Association and the Oslo City Commission for Knowledge and Education.