Kristina Tesser Derksen (born 1978 or 1979) is a Canadian lawyer and politician who was elected as the member of Parliament for Milton EastâÂÂHalton 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.
Tesser Derksen was born in 1978 or 1979 in Milton, Ontario, where she grew up. She earned an undergraduate degree in history and political science before earning a law degree from the University of Toronto.
Tesser Derksen was first elected to Milton Town Council representing Ward 1 in 2018 and was re-elected in 2022.
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.
In the 2025 federal election, Tesser Derksen ran as the Liberal candidate for the newly established riding of Milton EastâÂÂHalton Hills South. 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. Following a three-day recount, her victory was confirmed with a revised margin of 21 votes. Her seat on the Milton council was declared vacant on May 26.
Tesser DerksenâÂÂs husband, Chris Derksen, is a small business owner. They were married in 1998 and have four children.