Katherine Anne Green OBE JP is a British politician serving as Deputy Mayor of Greater Manchester for Policing and Crime since 2023. She previously served as Member of Parliament (MP) for Stretford and Urmston between 2010 and 2022. A member of the Labour Party, she served as Shadow Minister for Women and Equalities from 2015 to 2016, Chair of the Committees on Privileges and Standards from 2018 to 2020, and Shadow Secretary of State for Education from 2020 to 2021.

The Mayor of Greater Manchester is the directly elected mayor of Greater Manchester, responsible for strategic governance in the region that includes health, transport, housing, strategic planning, waste management, policing, the Greater Manchester Fire and Rescue Service and skills. The creation of the Mayor of Greater Manchester was agreed between the then Chancellor of the Exchequer, George Osborne, and Greater Manchester's 10 district council leaders. As well as having specific powers, the mayor chairs the Greater Manchester Combined Authority, also assuming the powers of the Greater Manchester Police and Crime Commissioner.