Duncan Alexander Webb (born 1967) is a New Zealand lawyer and politician. He was elected as a Member the New Zealand House of Representatives for Christchurch Central, representing the Labour Party, in the 2017 general election.

He was Chief Government Whip, Minister of Commerce and Consumer Affairs and Minister for State Owned Enterprises in the Sixth Labour Government.

Webb moved to Christchurch from London in 1974 when he was six years old.^[1] His father had attended Bible college before becoming a pastor at the Māori Evangelical Fellowship Church in Wainoni. After briefly living in Aranui, Webb's family moved to South Brighton where he grew up along with his four siblings.^[2]

He attended Shirley Boys' High School and left before finishing his final year, proceeding directly to the University of Canterbury to study law.^[1][2] Webb graduated Bachelor of Laws with Honours in 1989 before being awarded a Doctor of Laws in 2007.^[3]

Webb currently lives in Christchurch and has worked as a lawyer and as a law professor at University of Canterbury.^[4] Webb has also worked for the Public Interest Project, which seeks to get innocent people out of jail, and for the Howard League, which promotes prisoners’ rights.^[5] He is a long-time member of the Labour party, joining in 1999.^[6][2] He has three sons.^[4] He split from his wife, Tania, in 2016.^[1]

A long-time member of the Labour Party, Webb was Brendon Burns' campaign chairman during the 2011 election when Burns lost Christchurch Central to National candidate Nicky Wagner.^[2] Labour had failed to regain the seat in the 2014 election and Webb was selected as the party's candidate for the 2017 election.^[7] Webb's campaign chair was the former mayor of Christchurch Garry Moore.^[1] Webb defeated Wagner by 2,871 votes.^[8] After the election, Labour formed a coalition government with New Zealand First and the Green Party.

In Webb's first term of Parliament, he served on various select committees including Regulations Review (2017–2020), Foreign Affairs, Defence and Trade (2017–2018), Justice (2018–2019), Finance and Expenditure (2017–2020) and Environment (as chair, 2019–2020).^[9][10] Webb's first member's bill, the Fair Trading (Oppressive Contracts) Amendment Bill, was introduced in March 2018 but was discharged that May without a first reading.^[11]

During the 2020 New Zealand general election, Webb was re-elected in Christchurch Central, defeating National candidate Dale Stephens by 14,098 votes.^[12] On 2 November 2020, following the election, he became one of three junior whips for the Labour Party and was also appointed chair of the Finance and Expenditure select committee.^[10] After a June 2022 Cabinet reshuffle, in which senior whip Kieran McAnulty became a minister, Webb was promoted to senior whip.^[13]

A private Bill on behalf of the Girl Guides Association (New Zealand branch), which was concerned with the disposition of property held by the association in Waitākere, was introduced by Webb in 2021.^[14] However, the social services committee recommended it not proceed.^[15] Webb's second member's bill, the Companies (Directors Duties) Amendment Bill, was introduced to the House on 23 September 2021. The purpose of the Bill is to make it clear that company directors can take actions that take into account wider matters other than the company's finances.^[16]

On 31 January 2023, prime minister Chris Hipkins announced a Cabinet reshuffle, in which Webb was appointed a Minister outside of Cabinet,^[17] with the portfolios of commerce and consumer affairs and state owned enterprises.^[18] He held these positions until the government left office in November 2023. As commerce minister, Webb took responsibility for work regulating the supermarket industry. He appointed the first New Zealand Grocery Commissioner^[19] and instituted unit pricing regulations.^[20] With finance minister Grant Robertson, he announced a market study of the banking sector.^[21] As minister for state owned enterprises, he instituted reviews into KiwiRail disruptions and weather forecasting.^[22][23]

Webb was re-elected in Christchurch Central for a third time in October 2023, defeating Dale Stephens by a decreased margin of 1,841 votes.^[24] He is currently the Deputy Shadow Leader of the House and holds the justice, regulation, Earthquake Commission, and Christchurch Issues portfolios in the Shadow Cabinet of Chris Hipkins.^[25]

On 5 December 2023, Webb was granted retention of the title The Honourable, in recognition of his term as a member of the Executive Council.^[26]

In his maiden speech, Webb identified himself as a socialist.^[27] He voted in favour of the End of Life Choice Bill in 2019^[28] and Abortion Legislation Bill in 2020.^[29]