Nathalie Des Rosiers CM OOnt (born 1959) is a judge, lawyer, academic and former politician in Ontario, Canada.

During her tenure as a Member of Provincial Parliament, Des Rosiers served in the cabinet of Kathleen Wynne as Minister of Natural Resources and Forestry.

Des Rosiers clerked at the Supreme Court of Canada and practised law in London, Ontario, with Lerners LLP.

She brought this issue to the attention of the Canadian press and ensured that CCLA volunteers monitored the Toronto police for civil liberties violations during the conference.

[4] She also helped to discourage the practice of "carding", where police stop people who are not suspected of any criminal activity, ask for their identification and record that information for later review.