O'Connor is a township in the Canadian province of Ontario, located 32 kilometres (20 mi) west of the city of Thunder Bay.

The township was opened to settlement in 1887 because of the silver mining boom, and named by the Ontario government after Port Arthur businessman, alderman and police magistrate James Joseph O'Connor (1857–1930).

The township has four councillors, Chantal Alkins, Kevin Foekens, Jerry Loan, and Bishop Racicot.

The geography of O'Connor is mainly flat open farmland and rolling hills, with the Whitefish River Valley dominating the southeast corner of the township.

Major radio 105.3 The Giant and Rock 94 reach the township with good reception.