The 2009 Bradfield by-election was held for the Australian House of Representatives seat of Bradfield on 5 December 2009. This was triggered as a result of the resignation of former minister and ex-Liberal Party leader Brendan Nelson. The by-election was held on the same day as the Higgins by-election. The writ for the by-election was issued on 30 October, with the rolls closing on 9 November. Candidate nominations closed on 12 November, and were announced the following day. At 22 candidates, it ties with the 1992 Wills by-election for the most candidates to contest a federal lower house seat.