A by-election was staged in the New South Wales Legislative Assembly district of Macquarie Fields on 17 September 2005.
It was triggered by the resignation of sitting member and former minister Craig Knowles (Labor).
The by-election saw the Labor Party retain the seat with the election of candidate Steven Chaytor.
Steven Chaytor's stint as a member of parliament would prove to be a short one.
As a result, Chaytor stepped down as an MP and did not contest the 2007 state election.