A by-election for the Victorian Legislative Assembly district of Niddrie was held on 24 March 2012. The by-election was triggered by the resignation on 27 January 2012 of Rob Hulls, the former Deputy Premier of Victoria, who had held the seat since 1996. The Labor Party retained the seat.
- 23 February: Issue of writ
- 24 February: Nominations opened
- 1 March: Close of electoral roll
- 7 March: Close of nominations for party candidates
- 8 March: Close of nominations for independent candidates
- 9 March: Early voting commenced
- 22 March: Close of postal voting
- 23 March: Early voting closes
- 24 March: Polling day
Candidates who nominated for the by-election are (in ballot paper order):
|Labor Party||Ben Carroll|
|Democratic Labor Party||Michael Deverala|
|Australian Sex Party||Amy Myers|
|Christian Democratic Party||Frank Papafotiou|
The unregistered Australian Democrats nominated Rob Livesay as a candidate, however the party failed to correctly lodge the nomination form, with one of Livesay's supporting signatories not listed on the electoral roll in the district.
|Sex Party||Amy Myers||2,245||8.1||+8.1|
|Christian Democrats||Frank Papafotiou||1,588||5.8||+5.8|
|Democratic Labor||Michael Deverala||1,322||4.8||+4.8|
|Total formal votes||27,631||88.5||−3.2|
- "Niddrie by-election date announced". ABC News. 7 February 2012. Retrieved 7 February 2012.
- Niddrie District By-election 2012 Candidates, Victorian Electoral Commission.
- Ly, Linh. "Greens name candidate for Niddrie by-election". Moonee-valley-leader.whereilive.com.au. Archived from the original on 2 March 2012. Retrieved 26 July 2012.
- MEDIA RELEASE: Australian Democrats withdraw from Niddrie by Election, Australian Democrats, 8 March 2012.
- "Niddrie by-election results". Vec.vic.gov.au. Retrieved 26 July 2012.