The 2021 New South Wales mayoral elections were held on 4 December 2021 to elect mayors or lord mayors to 35 of the 128 local government areas (LGAs) in New South Wales.

[1][2] While most mayors in New South Wales are elected by councillors at meetings, several choose to have directly-elected (or popularly elected) mayors.

[3] At the 2017 local elections, three referendum questions were put to voters about directly-elected mayors.

[4][5] However, voters in North Sydney voted in favour of removing directly-elected mayoral elections.

[6] Incumbents at the time of the elections are highlighted in bold text.