Encompassing many of Christchurch's most affluent suburbs, Ilam was considered a safe National seat until the 2020 election.

[3] The 2020 redistribution, however, added Avonhead from Wigram and a large section of Selwyn around McLeans Island and Christchurch Airport.

Yellow background denotes an electorate win by a list member, or other incumbent.

Yellow background denotes an electorate win by a list member, or other incumbent.

Yellow background denotes an electorate win by a list member, or other incumbent.

Yellow background denotes an electorate win by a list member, or other incumbent.

Yellow background denotes an electorate win by a list member, or other incumbent.

Yellow background denotes an electorate win by a list member, or other incumbent.

Yellow background denotes an electorate win by a list member, or other incumbent.

Yellow background denotes an electorate win by a list member, or other incumbent.