Bukit Batok Single Member Constituency

In 1972, the constituency was formed from merging parts of Bukit Timah, Chua Chu Kang and Bukit Panjang constituencies and was known as Bukit Batok Constituency.[1] In 1988, after electoral reforms, it was known as Bukit Batok Single Member Constituency.

In 1997, it was merged into Bukit Timah Group Representation Constituency (GRC). In 2015, it was carved out as an SMC ahead of the 2015 general elections.

In 2016, incumbent PAP MP, David Ong, resigned due to personal reasons and a by-election was called to replace the empty seat. On 7 May, Murali Pillai won the Bukit Batok by-election against Singapore Democratic Party (SDP) secretary-general, Chee Soon Juan with a vote count of 61.2% to 38.8%.

At the 2020 Singaporean general election, Pillai was challenged by Chee again and won with a vote count of 54.80% to 45.20%.

Bukit Batok SMC is managed by the Jurong–Clementi Town Council.

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[2][3]

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[4][5]

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[6][7]

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

General Election 1984: Bukit Batok[8][9]

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[10][11]

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[12][13]

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[14][15]

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[16][17]

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[18][19]

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