About Cotton-O'Brien Law

Cotton O'Brien Law is a solo criminal defence practice in Toronto's Annex neighbourhood, founded by Cameron Cotton-O'Brien. The firm represents clients across Ontario in bail hearings, criminal trials, and criminal appeals, handling charges that range from assault, sexual assault, and domestic violence to drug and firearm offences, theft, and impaired driving. Cotton-O'Brien has appeared at all levels of court in the province, and before opening the firm, articled and worked as an associate at established Toronto criminal trial and appeal firms.

The law degree came from the University of Toronto Faculty of Law. Before law school, Cotton-O'Brien did graduate research in political theory at McGill University, producing a thesis on the right to justification in criminal punishment, taught classes on ancient political thought and the ethical philosophy of Aristotle and Nietzsche, and spent time as a visiting doctoral researcher at Goethe University in Frankfurt am Main.

Practice areas

In the community

  • While studying at the University of Toronto Faculty of Law, Cotton-O'Brien worked as a caseworker in the Criminal Division of Downtown Legal Services, a legal clinic that provides free representation to low-income clients.
  • Cotton-O'Brien has volunteered with the Canadian Association of Refugee Lawyers.

Good to know

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Where to find them

15 Bedford Road, Toronto, Ontario, Canada M5R 2J7 · 437-388-8759

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This listing was generated by AI from public sources in August 2026. It may contain errors, and we can’t guarantee it’s accurate or complete. Before you rely on anything here, verify it on the firm’s own website. Verify licence status in the Law Society of Ontario directory ↗

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