The 2011 New South Wales state election held on Saturday, 26 March 2011. The 16-year-incumbent Labor Party government led by Premier Kristina Keneally was defeated in a landslide by the Liberal–National Coalition opposition led by Barry O'Farrell.

Kristina Marie Kerscher Keneally is an American-born Australian politician who served as the first female Premier of New South Wales from 2009 to 2011 and was later a Labor Senator for New South Wales from February 2018 until April 2022. She resigned from the Senate to contest the House of Representatives seat of Fowler, but was unsuccessful. From 2019 to 2022 she served as Deputy Leader of the Opposition in the Senate, Shadow Minister for Home Affairs, and Shadow Minister for Immigration and Citizenship.