The 1862 Ellesmere by-election was a by-election held on 9 June 1862 during the 3rd New Zealand Parliament in the Canterbury electorate of .
The by-election was caused by the resignation of the incumbent MP Thomas Rowley.
The by-election was won by James FitzGerald. He was unopposed.
At two other by-elections held in June 1862 for and the candidates were also returned unopposed; see and .