Kilpennathur is a state assembly constituency in Tamil Nadu, India, that was formed after constituency delimitations in 2007. Its State Assembly Constituency number is 64. It comprises a portion of Tiruvannamalai taluk and is included in the similarly named parliamentary constituency for national elections. It is one of the 234 State Legislative Assembly Constituencies in Tamil Nadu, in India.

Members of the Legislative Assembly

Year	Member	Party
2011	A. K. Aranganathan		All India Anna Dravida Munnetra Kazhagam
2016	K. Pitchandi		Dravida Munnetra Kazhagam
2021

Election results

2021

2021 Tamil Nadu Legislative Assembly election : Kilpennathur

Party		Candidate	Votes	%	±%
	DMK	K. Pitchandi	104,675	51.34%	+1.12
	PMK	K. Selvakumar	77,888	38.20%	+27.69
	NTK	Dr. R. Ramesh Babu	11,541	5.66%	New
	AMMK	P. Karthikeyan	2,191	1.07%	New
	MNM	V. Suganantham	1,437	0.70%	New
Margin of victory			26,787	13.14%	-4.43%
Turnout			203,884	80.55%	-3.90%
Rejected ballots			252	0.12%
Registered electors			253,101
	DMK hold		Swing	1.12%

2016

2016 Tamil Nadu Legislative Assembly election : Kilpennathur

Party		Candidate	Votes	%	±%
	DMK	K. Pitchandi	99,070	50.22%	+4.37
	AIADMK	K. Selvamani	64,404	32.64%	-15.55
	PMK	G. Ediroli Manian	20,737	10.51%	New
	CPI	K. Jothi	4,613	2.34%	New
	BSP	S. Devendiran	1,273	0.65%	-0.05
	BJP	M. Subbarayan	1,209	0.61%	-0.43
	NOTA	NOTA	1,164	0.59%	New
Margin of victory			34,666	17.57%	15.22%
Turnout			197,287	84.45%	-0.02%
Registered electors			233,605
	DMK gain from AIADMK		Swing	2.02%

2011

2011 Tamil Nadu Legislative Assembly election : Kilpennathur

Party		Candidate	Votes	%	±%
	AIADMK	A. K. Aranganathan	83,663	48.20%	New
	DMK	K. Pitchandi	79,582	45.85%	New
	Independent	D. Sridharan	2,301	1.33%	New
	BJP	D. Pitchandi	1,811	1.04%	New
	Independent	R. Settu	1,724	0.99%	New
	BSP	A. Isaac Newton	1,203	0.69%	New
	Independent	M. Murugan	1,057	0.61%	New
Margin of victory			4,081	2.35%
Turnout			173,576	84.47%
Registered electors			205,491
	AIADMK win (new seat)