Helena Jaczek (born November 5, 1950) is a Canadian politician from Ontario, Canada.
She was elected in the 2019 federal election to represent Markham—Stouffville in the House of Commons of Canada as a member of the Liberal Party of Canada.
She was a Liberal member of the Legislative Assembly of Ontario from 2007 to 2018 who represented the riding of Oak Ridges—Markham.
She served as Minister of Community and Social Services from 2014 until 2018 and as Minister of Health and Long-Term Care in 2018 in the cabinet of Kathleen Wynne.