Kristina Tesser Derksen

Kristina Tesser Derksen is a Canadian lawyer and politician who was elected as the member of Parliament for Milton East—Halton Hills South in the 2025 Canadian federal election as a member of the Liberal Party. She previously served two terms as a Milton town councillor.

Kristina Tesser Derksen MP
Member of Parliament for Milton East—Halton Hills South
Incumbent
Assumed office April 28, 2025
Preceded by	Riding Established
Town of Milton Ward 1 Councillor
In office 2018–2025
Personal details
Born	Milton, Ontario, Canada
Political party	Liberal
Children	4
Website	kristinatesserderksen.liberal.ca

Background

Tesser Derksen was born and raised in Milton, Ontario. She earned an undergraduate degree in history and political science before earning a law degree from the University of Toronto.^[1]

Political career

Tesser Derksen was first elected to Milton Town Council representing Ward 1 in 2018 and was re-elected in 2022.^[2]

In the 2025 Ontario provincial election, Tesser Derksen ran as the Ontario Liberal Party candidate for the riding of Milton. She was defeated by Progressive Conservative incumbent Zee Hamid.^[3]

In the 2025 federal election, Tesser Derksen ran as the Liberal candidate for the newly established riding of Milton East—Halton Hills South.^[4] Initially declared defeated, a subsequent validation process confirmed her victory by a margin of 29 votes over Conservative candidate Parm Gill. Because of the narrow margin, a judicial recount was automatically triggered.^[5][6] Following a three-day recount, her victory was confirmed with a revised margin of 21 votes.^[7]

Personal life

Tesser Derksen’s husband, Chris Derksen, is a small business owner. They were married in 1998^{[citation needed]} and have four children.^[8]

Electoral record

v t e 2025 Canadian federal election: Milton East—Halton Hills South
Party	Candidate	Votes	%	±%	Expenditures
	Liberal	Kristina Tesser Derksen	32,178	48.25	+6.54
	Conservative	Parm Gill	32,157	48.22	+6.97
	New Democratic	Muhammad Riaz Sahi	1,029	1.54	-8.03
	Green	Susan Doyle	672	1.01	-1.59
	People's	Walter J. Hofman	475	0.71	-4.17
	Independent	Shahbaz Mahmood Khan	174	0.26
Total valid votes/expense limit			66,685	99.51
Total rejected ballots			328	0.49
Turnout			67,013	74.18
Eligible voters			90,340
	Liberal notional hold		Swing		-0.21
Source: Elections Canada[9][10]
Notes: This riding's results were subject to an automatic judicial recount on May 9, 2025.[11] Number of eligible voters does not include election day registrations.

2025 Ontario general election
Party	Candidate	Votes	%	±%
	Progressive Conservative	Zee Hamid	20,091	47.43	+0.39
	Liberal	Kristina Tesser Derksen	17,551	41.44	+3.19
	New Democratic	Katherine Cirlincione	2,403	5.67	–1.09
	Green	Susan Doyle	1,130	2.67	–0.09
	New Blue	John Spina	866	2.04	–1.98
	Centrist	Mohsin Rizvi	316	0.75	N/A
Total valid votes/expense limit			42,357	99.45	–0.29
Total rejected, unmarked, and declined ballots			235	0.55	+0.29
Turnout			42,592	42.45	+14.73
Eligible voters			100,342
	Progressive Conservative hold		Swing		–1.40
Source: Elections Ontario[12][13]