The 1883 Peninsula by-election was a by-election held on 22 January 1883 during the 8th New Zealand Parliament in the Otago electorate of Peninsula.
The by-election was caused by the death of the incumbent MP James Seaton on 10 November 1882. The by-election was won by William Larnach.
He was opposed by Bishop Moran and Michael Donnelly. One sub-headline on the result of the election was "Bishop defeated".[1] Another report expected a "close run" between Larnarch and Donnelly, but the Bishop came second.[2]