Casual vacancies in the Dewan Rakyat (House of Representatives) are filled through by-elections, which may occur when a member of the Dewan Rakyat dies, resigns or for some other reason. Under Article 54(1) of the Constitution of Malaysia, the Election Commission of Malaysia has to call a by-election within 60 days of the establishment of the casual vacancy. A by-election is not held when there are less than two years left in the Parliament's term, unless the Speaker notifies the Election Commission that the casual vacancy affects the majority of the governing party.
Brackets around a date indicate that the candidate was unopposed when nominations closed. These candidates were declared "elected unopposed" with effect from the date of the closing of nominations, and there was no need to hold a by-election.
| By-election | Date | Incumbent | Party | Winner | Party | Cause | ||
|---|---|---|---|---|---|---|---|---|
| Kemaman | 2 December 2023 | Che Alias Hamid | PN (PAS) | Ahmad Samsuri Mokhtar | PN (PAS) | Nullified and disqualified for element of bribery (election petition) | ||
| Pulai | 9 September 2023 | Salahuddin Ayub | PH (AMANAH) | Suhaizan Kayat | PH (AMANAH) | Death (brain hemorrhage) | ||
| Kuala Terengganu | 12 August 2023 | Ahmad Amzad Hashim | PN (PAS) | Ahmad Amzad Hashim | PN (PAS) | Nullified and disqualified for element of bribery (election petition) | ||
| Padang Serai | 7 December 2022 | Karupaiya Mutusami | PH (PKR) | Azman Nasrudin | PN (BERSATU) | The election was postponed from the original date because of the death of the incumbent after the nomination day. | ||
| By-election | Date | Incumbent | Party | Winner | Party | Cause | |||
|---|---|---|---|---|---|---|---|---|---|
| Pekan | Not held | Najib Razak | BN (UMNO) | Disqualification (sentenced to jail (1MDB scandal)) | |||||
| Gerik | Cancelled | Hasbullah Osman | BN (UMNO) | Death (heart attack) | |||||
| Batu Sapi | Cancelled | WARISAN | Death (pneumonia) | ||||||
| Kimanis | 18 January 2020 | Independent | Mohamad Alamin | BN (UMNO) | Nullified and disqualified for election process discrepancies (election petition) | ||||
| Tanjung Piai | 16 November 2019 | PH (BERSATU) | Wee Jeck Seng | BN (MCA) | Death (heart attack) | ||||
| Sandakan | 11 May 2019 | Stephen Wong Tien Fatt | PH (DAP) | PH (DAP) | Death (cardiac arrest) | ||||
| Cameron Highlands | 26 January 2019 | Sivarraajh Chandran | BN (MIC) | Ramli Mohd. Noor | BN (Direct Member) | Nullified and disqualified for element of bribery (election petition) | |||
| Port Dickson | 13 October 2018 | Danyal Balagopal Abdullah | PH (PKR) | Anwar Ibrahim | PH (PKR) | Resignation ('PD Move') | |||
| By-election | Date | Incumbent | Party | Winner | Party | Cause | |||
|---|---|---|---|---|---|---|---|---|---|
| Paya Besar | Not held | Abdul Manan Ismail | BN (UMNO) | Death (suspected heart attack & accident in a bathroom) | |||||
| Jelebu | Not held | Zainuddin Ismail | BN (UMNO) | Death (brain tumor) | |||||
| Sungai Besar | 18 June 2016 | Noriah Kasnon | BN (UMNO) | Budiman Mohd Zohdi | BN (UMNO) | Death (helicopter crash) in Sarawak. | |||
| Kuala Kangsar | 18 June 2016 | Wan Mohammad Khair-il Anuar Wan Ahmad | BN (UMNO) | Mastura Mohd Yazid | BN (UMNO) | Death (helicopter crash) in Sarawak. | |||
| Permatang Pauh | 7 May 2015 | Anwar Ibrahim | PKR | PKR | Disqualification (found guilty of sodomy) | ||||
| Rompin | 5 May 2015 | Jamaluddin Mohd Jarjis | BN (UMNO) | BN (UMNO) | Death (helicopter crash) in Semenyih, Selangor. | ||||
| Telok Intan | 31 May 2014 | Seah Leong Peng | DAP | BN (Gerakan) | Death (bladder cancer) | ||||
| Bukit Gelugor | 25 May 2014 | DAP | Ramkarpal Singh | DAP | Death (car accident) | ||||
| By-election | Date | Incumbent | Party | Winner | Party | Cause | ||
|---|---|---|---|---|---|---|---|---|
| Sabak Bernam | Not held | Abdul Rahman Bakri | BN (UMNO) | Disqualification (sentenced to jail) | ||||
| Titiwangsa | Not held | Lo' Lo' Mohamad Ghazali | PAS | Death (cancer) | ||||
| Batu Sapi | 4 November 2010 | Edmund Chong Ket Wah | BN (PBS) | BN (PBS) | Death (motorcycle accident) | |||
| Sibu | 16 May 2010 | Robert Lau Hoi Chew | BN (SUPP) | DAP | Death (liver cancer) | |||
| Hulu Selangor | 25 April 2010 | Zainal Abidin Ahmad | PKR | BN (MIC) | Death (brain cancer) | |||
| Bukit Gantang | 7 April 2009 | Roslan Shaharum | PAS | PAS | Death (heart attack) | |||
| Kuala Terengganu | 17 January 2009 | Razali Ismail | BN (UMNO) | PAS | Death (heart attack) | |||
| Permatang Pauh | 26 August 2008 | PKR | Anwar Ibrahim | PKR | Resignation to create vacancy | |||
| By-election | Date | Incumbent | Party | Winner | Party | Cause | ||
|---|---|---|---|---|---|---|---|---|
| Labis | Not held | Chua Soi Lek | BN (MCA) | Resignation However, SPR did not hold a by-election. | ||||
| Pasir Puteh | Not held | Kalthom Othman | PAS | Che Min Che Ahmad | BN (UMNO) | Election declared null and void. However, SPR did not hold a by-election. | ||
| By-election | Date | Incumbent | Party | Winner | Party | Cause | ||
|---|---|---|---|---|---|---|---|---|
| Kangar | Not held | Abdul Hamid Pawanteh | BN (UMNO) | Resignation on appointment as President of Dewan Negara | ||||
| Gaya | 12 October 2002 | BN (SAPP) | Liew Teck Chan | BN (SAPP) | Disqualification (found guilty of election offences) | |||
| Pendang | 18 July 2002 | PAS | Othman Abdul | BN (UMNO) | Death (heart attack) | |||
| Telok Kemang | 10 June 2000 | S. A. Anpalagan | BN (MIC) | Sothinathan Sinna Goundar | BN (MIC) | Death (heart attack) | ||
| By-election | Date | Incumbent | Party | Winner | Party | Cause | |||
|---|---|---|---|---|---|---|---|---|---|
| Permatang Pauh | Not held | Anwar Ibrahim | Independent | Disqualification (found guilty of sodomy and corruption) | |||||
| Kota Melaka | Not held | Lim Guan Eng | DAP | Disqualification (jailed under Sedition Act) | |||||
| Arau | 4 July 1998 | Kamarudin Ahmad | BN (UMNO) | Hashim Jasin | PAS | Death (stroke) | |||
| Kuala Selangor | 29 May 1997 | BN (UMNO) | Jamaluddin Adnan | BN (UMNO) | Resignation (to contest in a Permatang by-election) | ||||
| Telok Intan | 17 May 1997 | Ong Tin Kim | BN (Gerakan) | DAP | Death (cancer) | ||||
| Lipis | (14 January 1997) | Abu Dahari Osman | BN (UMNO) | Amihamzah Ahmad | BN (UMNO) | Death (colon cancer) | |||
| Bagan | 9 September 1995 | Patto Perumal | DAP | Lim Hock Seng | DAP | Death (heart attack) | |||
| Gua Musang | 29 August 1995 | S46 | Tengku Razaleigh Hamzah | S46 | Election declared null and void | ||||
| Bukit Bintang | Not held | DAP | Lee Chong Meng | BN (MCA) | Election declared null and void. However, SPR did not hold a by-election. | ||||
| By-election | Date | Incumbent | Party | Winner | Party | Cause | ||
|---|---|---|---|---|---|---|---|---|
| Bentong | 13 May 1989 | Chan Siang Sun | BN (MCA) | Lim Ah Lek | BN (MCA) | Death (heart attack) | ||
| Ampang Jaya | 28 January 1989 | Lim Ann Koon | BN (MCA) | Ong Tee Keat | BN (MCA) | Resignation | ||
| Johor Bahru | 25 August 1988 | BN (UMNO) | Shahrir Abdul Samad | Independent | Resigned to recontest | |||
| Gopeng | 16 May 1987 | BN (MCA) | Ting Chew Peh | BN (MCA) | Resignation (Pan-Electric Industries scandal and deposit-taking co-operative scandal; imprisoned in Singapore) | |||
| Limbawang | 18 April 1987 | Abdul Hamid Mustapha | BN (USNO) | Mustapha Harun | BN (USNO) | Death (heart attack) | ||
| Lubok Antu | 4 April 1987 | Andrew Janggi Muyang | BN (PBDS) | Jawah Gerang | BN (PBDS) | Death (car accident) | ||
| By-election | Date | Incumbent | Party | Winner | Party | Cause | ||
|---|---|---|---|---|---|---|---|---|
| Ulu Padas | 11–12 October 1985 | BN (BERJAYA) | Kadoh Agundong | PBS | Resignation | |||
| Padang Terap | 19 January 1985 | BN (UMNO) | Baharom Abu Bakar | BN (UMNO) | Resignation on appointment as Yang di-Pertua Negeri of Malacca | |||
| Seremban | 19 November 1983 | BN (MCA) | Chen Man Hin | DAP | Resignation | |||
| Tampin | 24 September 1983 | Mokhtar Hashim | BN (UMNO) | Omar Abdullah | BN (UMNO) | Resignation (convicted of murder) | ||
| Ulu Muda | 16 March 1983 | Hashim Endut | BN (UMNO) | Othman Abdul | BN (UMNO) | Resignation (found guilty of offence involving the wholesale of rice) | ||
| By-election | Date | Incumbent | Party | Winner | Party | Cause | ||
|---|---|---|---|---|---|---|---|---|
| Sri Gading | 26 September 1981 | BN (UMNO) | Mustaffa Mohammad | BN (UMNO) | Resignation | |||
| Paloh | (4 May 1981) | BN (PBB) | Abang Abu Bakar Abang Mustapha | BN (PBB) | Resignation (to accept the position of Yang di-Pertua Negeri of Sarawak) | |||
| Kimanis | (9 April 1981) | Pengiran Aliuddin Pengiran Tahir | BN (BERJAYA) | Pengiran Othman Pengiran Rauf | BN (BERJAYA) | Resignation (to contest in 1981 Sabah state election) | ||
| Mukah | (28 January 1980) | Salleh Jafaruddin | BN (PBB) | Edwin Esnen Unang | BN (PBB) | Resignation (to contest in an Oya by-election) | ||
| Pelabuhan Kelang | 1 December 1979 | BN (MIC) | V. Govindaraj | BN (MIC) | Death (heart attack) | |||
| By-election | Date | Incumbent | Party | Winner | Party | Cause | ||
|---|---|---|---|---|---|---|---|---|
| Pontian | 28 January 1978 | Ali Ahmad | BN (UMNO) | Ikhwan Nasir | BN (UMNO) | Death (MH653 crash) | ||
| Keningau | 26–30 July 1977 | BN (USNO) | Harris Salleh | BN (BERJAYA) | Resignation | |||
| Panti | (24 February 1977) | BN (UMNO) | Saadun Muhammad Noh | BN (UMNO) | Death (stroke) | |||
| Kimanis | 29 January 1977 | Pengiran Tahir Pengiran Petra | BN (USNO) | Pengiran Aliuddin Pengiran Tahir | Independent | Death | ||
| Kemaman | 8 May 1976 | Wan Abdul Kadir Ismail | BN (UMNO) | Abdul Manan Othman | BN (UMNO) | Death | ||
| Pekan | (21 February 1976) | BN (UMNO) | Mohd Najib Abdul Razak | BN (UMNO) | Death (leukaemia) | |||
| Selayang | 14 June 1975 | Walter Loh Poh Khan | BN (MCA) | Rosemary Chow Poh Kheng | BN (MCA) | Death | ||
| By-election | Date | Incumbent | Party | Winner | Party | Cause | ||
|---|---|---|---|---|---|---|---|---|
| Rajang | 7–12 January 1974 | Tibuoh Rantai | SUPP | Jawan Empaling | SUPP | Death | ||
| Johore Timor | (8 September 1973) | Alliance (UMNO) | Abdul Rahman Sabri | Alliance (UMNO) | Death (heart attack) | |||
| Kuala Kedah | 20 January 1973 | Alliance (UMNO) | Senu Abd Rahman | Alliance (UMNO) | Resignation | |||
| Rembau-Tampin | 8 July 1972 | Sulaiman Mohamed Attas | Alliance (UMNO) | Mokhtar Hashim | Alliance (UMNO) | Death | ||
| Ulu Selangor | 3 June 1972 | Khaw Kai Boh | Alliance (MCA) | Michael Chen Wing Sum | Alliance (MCA) | Death (heart attack) | ||
| Lipis | 8 April 1972 | Abdul Razak Hussin | Alliance (UMNO) | Ghazali Shafie | Alliance (UMNO) | Resignation | ||
| Bau-Lundu | 11–14 October 1971 | Sinyium Mutit | SUPP | Joseph Valentine Cotter | SUPP | Resignation | ||
| Kapar | 3 April 1971 | Hamzah Alang | Alliance (UMNO) | Mohd. Tahir Abdul Manan | Alliance (UMNO) | Death | ||
| Malacca Selatan | 30 January 1971 | Abdul Karim Abu | Alliance (UMNO) | Ahmad Ithnin | Alliance (UMNO) | Election for Malacca Selatan federal constituency and another 40 federal constituencies in Sabah and Sarawak were postponed from the scheduled date, 10 May 1969. | ||
| By-election | Date | Incumbent | Party | Winner | Party | Cause | ||
|---|---|---|---|---|---|---|---|---|
| Kuantan | (11 November 1968) | Abdul Rahman Talib | Alliance (UMNO) | Mohamed Taib | Alliance (UMNO) | Death (heart attack) | ||
| Segamat Utara | 19 October 1968 | Abdullah Mohd Salleh | Alliance (UMNO) | Musa Hitam | Alliance (UMNO) | Death | ||
| Kelantan Hilir | 21 October 1967 | Ahmad Abdullah | PAS | Nik Abdul Aziz Nik Mat | PAS | Death (car accident) | ||
| Pasir Mas Hulu | 19 August 1967 | Abdul Samad Gul Ahmad Mianji | PAS | Tengku Zaid Tengku Ahmad | PAS | Death (murder) | ||
| Raub | (14 August 1967) | Hussein Hassan | Alliance (UMNO) | Hamzah Abu Samah | Alliance (UMNO) | Death | ||
| Bruas | 4 June 1966 | Yeoh Tat Beng | Alliance (MCA) | Chew Biow Chuon | Alliance (MCA) | Death (car accident) | ||
| Krian Laut | 12 March 1966 | Abdul Rauf Abdul Rahman | Alliance (UMNO) | Sulaiman Taib | Alliance (UMNO) | Death (long illness) | ||
| Seberang Selatan | 31 October 1964 | Mohamed Noordin Mastan | Alliance (UMNO) | Snawi Ismail | Alliance (UMNO) | Death | ||
| Bachok | 27 June 1964 | Zulkiflee Muhammad | PAS | Abu Bakar Hamzah | PAS | Death (car accident) | ||
| Lipis | 20 October 1962 | Mohamed Sulong Mohd. Ali | Alliance (UMNO) | Abdul Razak Hussin | Alliance (UMNO) | Death | ||
| Kuala Trengganu Selatan | 19 March 1962 | Parti Negara | Ismail Kassim | Alliance (UMNO) | Death (heart attack) | |||
| Telok Anson | 30 May 1961 | Woo Saik Hong | Alliance (MCA) | Too Joon Hing | Independent | Death | ||
| Kampar | 18 May 1960 | Leong Kee Nyean | Alliance (MCA) | Chan Yoon Onn | PPP | Disqualification (found guilty of election offences) | ||
| Kedah Tengah | 30 September 1959 | Khir Johari | Alliance (UMNO) | Khir Johari | Alliance (UMNO) | The only remaining constituency where elections have not been completed in the Malayan general election, 1959. | ||
| By-election | Date | Incumbent | Party | Winner | Party | Cause | |||
|---|---|---|---|---|---|---|---|---|---|
| Batu Pahat | 14 December 1957 | S. Chelvasingam MacIntyre | Alliance (MIC) | Syed Esa Alwee | Alliance (UMNO) | Resignation on appointment as Malayan High Commissioner to India | |||
| Ipoh-Menglembu | 23 November 1957 | Alliance (MCA) | D. R. Seenivasagam | PPP | Resignation on appointment as Yang di-Pertua Negeri of Malacca | ||||
| Sungei Perak Ulu | 26 October 1957 | Mohamed Ghazali Jawi | Alliance (UMNO) | Meor Samsudin Meor Yahya | Alliance (UMNO) | Resignation on appointment as Menteri Besar of Perak | |||