Khumtai Assembly constituency is one of the 126 assembly constituencies of Assam Legislative Assembly. Khumtai forms part of the Kaliabor Lok Sabha constituency.

Members of Legislative Assembly

• 1978: Nogen Borua, Janata Party
• 1983: Jiba Kanta Gogoi, Indian National Congress
• 1985: Probin Kumar Gogoi, Independent
• 1991: Jiba Kanta Gogoi, Indian National Congress
• 1996: Probin Gogoi, Independent
• 2001: Jiba Kanta Gogoi, Indian National Congress
• 2002 by-election: Probin Gogoi, Asom Gana Parishad
• 2006: Probin Gogoi, Asom Gana Parishad
• 2011: Bismita Gogoi, Indian National Congress
• 2016: Mrinal Saikia, Bharatiya Janata Party
• 2021: Mrinal Saikia, Bharatiya Janata Party

Election results

2021

2021 Assam Legislative Assembly election: Khumtai

Party		Candidate	Votes	%	±%
	BJP	Mrinal Saikia	65,655	56.49	+1.25
	INC	Bismita Gogoi	38,522	33.14	-5.93
	NOTA	None of the above	1,399	1.2	-0.03
Majority			27,133	23.35	+7.18
Turnout			1,16,233	82.28
Registered electors			1,41,259
	BJP hold		Swing

2016

2016 Assam Legislative Assembly election: Khumtai

Party		Candidate	Votes	%	±%
	BJP	Mrinal Saikia	57,637	55.24
	INC	Bismita Gogoi	40,763	39.07
	NOTA	None of the above	1,286	1.23
Majority			16,874	16.17
Turnout			1,04,322	86.73
Registered electors			1,20,283
	BJP gain from INC		Swing