Elections were held in Northumberland County, Ontario, on October 24, 2022, in conjunction with municipal elections across the province.
The Northumberland County Council consists of the seven mayors of its constituent municipalities.
The following were the results for mayor of Alnwick/Haldimand.
Mayor Brian Ostrander was challenged by municipal councillor Doug LeBlanc.
The following were the results for mayor of Cobourg.
Mayor Mandy Martin was re-elected by acclamation.
Scott Jibb was elected mayor of Hamilton by acclamation.
Mayor Bob Sanderson did not run for re-election.
The following were the results for mayor of Port Hope.
The following were the results for mayor of Trent Hills.