N. 11 Permatang Pasir by-election was held following the death of its elected representative, Y. B. Dato' Mohd Hamdan bin Abd. Rahman on the 31st of July 2009. EC held its meeting on the 10th of August 2009 and decided on the following dates:

(i) Date of Confirmed Vacancy: 1 August 2009
(ii) Date of Issuance of Writ: 10 August 2009
(iii) Date of Issuance of Notice : 11 August 2009
(iv) Date of Nomination of Candidates: 17 August 2009
(v) Date of Election: 25 August 2009

The Electoral Roll used was updated and re-gazetted on the 7th of August 2009, containing 20,290 voters, which consists of 20,289 ordinary voters and 1 postal voters.

Statement of the Poll After The Official Addition of Votes (Form 16)