Bukit Batok Single Member Constituency

Bukit Batok Single Member Constituency was a single member constituency (SMC) in the western area of Singapore. At abolition, it was managed by Jurong–Clementi Town Council.

Bukit Batok
Single Member constituency for the Parliament of Singapore
Region	West Region, Singapore
Electorate	29,950
Current constituency
Created	1972; 53 years ago (1972)
Seats	1
Party	People's Action Party
Member(s)	Constituency abolished
Town Council	Jurong–Clementi
Reformed	2015
Reformed from	Jurong GRC
Merged	1997, 2025
Merged to	Jurong East–Bukit Batok GRC (2025)

History

Bukit Batok Constituency was created in 1972 from parts of the constituencies of Bukit Timah, Chua Chu Kang and Bukit Panjang. It was renamed Bukit Batok Single Member Constituency in 1988 after the creation of group representation constituencies (GRCs) and lasted until the 1997 general election.^[1]

In 2016, the then-incumbent Member of Parliament (MP), David Ong from the governing People's Action Party (PAP), resigned after having an extramarital affair; a by-election was called to replace the empty seat.^[2] On 7 May, Murali Pillai from the PAP defeated Singapore Democratic Party (SDP) secretary-general, Chee Soon Juan with a vote count of 61.2% to 38.8%.^[3]

On 11 March 2025, the Elections Department Singapore updated the electoral divisions for the 2025 general election. Bukit Batok SMC was merged into Jurong East–Bukit Batok GRC.^[4]

Member of Parliament

Year	Member	Party
Formation
1972	Chai Chong Yii		PAP
1976
1980
1984
1988	Ong Chit Chung
1991
Constituency abolished (1997 – 2015)
2015	David Ong Kim Huat		PAP
2016	K. Muralidharan Pillai
2020
Constituency abolished (2025)

Electoral results

Note : Elections Department Singapore do not include rejected votes for calculation of candidate's vote share. Hence, the total of all candidates' vote share will be 100%.

Elections in 1970s

General Election 1972: Bukit Batok^[5][6]

Party		Candidate	Votes	%
	PAP	Chai Chong Yii	9,765	73.78
	UNF	Vetrivelu Rengaswamy	3,471	26.22
Majority			6,294	47.56
Registered electors			14,563
Total valid votes			13,236	97.16
Rejected ballots			387	2.84
Turnout			13,623	93.55
	PAP win (new seat)

General Election 1976: Bukit Batok^[7][8]

Party		Candidate	Votes	%	±%
	PAP	Chai Chong Yii	12,216	84.57	10.79
	SJP	Sulaiman Jaffar	2,229	15.43	N/A
Majority			9,987	69.14	21.6
Registered electors			15,650		7.46
Total valid votes			14,445	96.88	0.28
Rejected ballots			465	3.12	0.28
Turnout			14,910	95.27	1.72
	PAP hold		Swing	10.79

Elections in 1980s

General Election 1980: Bukit Batok^[9][10]

Party		Candidate	Votes	%	±%
	PAP	Chai Chong Yii	Unopposed
Registered electors			18,275		16.77
	PAP hold

General Election 1984: Bukit Batok^[11][12]

Party		Candidate	Votes	%	±%
	PAP	Chai Chong Yii	14,767	78.27	N/A
	UPF	Tan Jue Kit	4,099	21.73	N/A
Majority			10,668	56.54	N/A
Registered electors			20,812		13.88
Total valid votes			18,866	96.23	N/A
Rejected ballots			740	3.77	N/A
Turnout			19,606	94.21	N/A
	PAP hold		Swing	N/A

General Election 1988: Bukit Batok^[13][14]

Party		Candidate	Votes	%	±%
	PAP	Ong Chit Chung	12,873	55.94	22.33
	SDP	Kwan Yue Keng	10,139	44.06	N/A
Majority			2,734	11.88	44.66
Registered electors			24,138		15.98
Total valid votes			23,012	96.88	0.65
Rejected ballots			381	3.12	0.65
Turnout			23,393	96.91	2.7
	PAP hold		Swing	22.33

Elections in 1990s

General Election 1991: Bukit Batok^[15][16]

Party		Candidate	Votes	%	±%
	PAP	Ong Chit Chung	12,205	51.8	4.1
	SDP	Kwan Yue Keng	11,347	48.2	4.1
Majority			858	3.57	8.2
Registered electors			24,908		3.19
Total valid votes			23,552	97.86	0.98
Rejected ballots			515	2.14	0.98
Turnout			24,067	96.6	0.3
	PAP hold		Swing	4.1

Elections in 2010s

General Election 2015: Bukit Batok^[17][18]

Party		Candidate	Votes	%
	PAP	David Ong Kim Huat	18,234	73.02
	SDP	Sadasivam Veriyah	6,588	26.38
	Independent	Samir Salim Neji	150	0.60
Majority			11,646	46.64
Registered electors			27,077
Total valid votes			24,972	97.86
Rejected ballots			546	2.14
Turnout			25,517	94.24
	PAP win (new seat)

By-election 2016: Bukit Batok^[19][20]

Party		Candidate	Votes	%	±%
	PAP	K. Muralidharan Pillai	14,452	61.23	11.79
	SDP	Chee Soon Juan	9,150	38.77	12.39
Majority			5,302	22.46	24.18
Registered electors			25,727		4.99
Total valid votes			23,602	97.43	0.43
Rejected ballots			622	2.57	0.43
Turnout			24,192	94.03	0.21
	PAP hold		Swing	12.09

Elections in 2020s

General Election 2020: Bukit Batok^[21][22]

Party		Candidate	Votes	%	±%
	PAP	K. Muralidharan Pillai	15,500	54.80	6.43
	SDP	Chee Soon Juan	12,787	45.20	6.43
Majority			2,713	9.60	12.86
Registered electors			29,948		16.41
Total valid votes			28,287	98.15	0.72
Rejected ballots			533	1.85	0.72
Turnout			28,820	96.23	2.04
	PAP hold		Swing	6.43