Marian Leslie Hobbs (18 December 1947 - ) is a New Zealand politician and Labour MP for Wellington Central.

Hobbs stood unsuccessfully in the Selwyn by-election of 1994, but was subsequently elected to Parliament as a list MP in the 1996 elections (having unsuccessfully contested the Kaikoura seat against National's Doug Kidd). In the 1999 elections, Hobbs won the Wellington Central electorate, defeating incumbent ACT party leader Richard Prebble.

After Labour's electoral victory in 1999, Hobbs was appointed to Cabinet, becoming Minister for the Environment, Minister of Biosecurity, Minister of Broadcasting, and Minister Responsible for the National Library of New Zealand and Archives New Zealand. In February 2001, she briefly resigned from Cabinet while an enquiry was undertaken regarding her allowance claims; she returned in late March after being cleared.

She is currently the Minister for the Environment, Minister for Disarmament and Arms Control, Associate Minister of Foreign Affairs and Trade with responsibility for Official Development Assistance, Associate Minister for Biosecurity, Associate Minister of Education, Minister Responsible for the National Library, Minister Responsible for Archives New Zealand, and Minister Responsible for Urban Affairs.

Before entering politics, Hobbs was a teacher and a school principal.