About Mayo Law

Mayo Law is a small cross-border law firm with offices in Toronto and New York, serving individuals, families, founders, investors, and businesses whose legal needs cross the Canada-US border. The firm describes its own positioning as Toronto-first, with cross-border work added when a client's business or family situation calls for it. Its practice covers Canadian and US immigration, Ontario real estate, business and corporate law, compliance and risk management, white collar defense, and notary public services in both Ontario and New York.

The firm operates through two affiliated entities, Mayo Law PC in Ontario and Joseph Mayo PLLC in New York, each licensed and responsible for its own jurisdiction. Joseph Mayo, the firm's principal attorney, holds a Master of Laws (LL.M.) from New York University School of Law, is licensed with the Law Society of Ontario and the New York State Bar, and belongs to the American Bar Association. That dual licensure means a client with matters spanning both countries can work with a single firm rather than retaining separate counsel in each one.

Good to know

A person using a wheelchairAccessible restroomA rainbow pride heartLGBTQ+ friendlyA blue parking sign beside a car in a parking spaceParking availableA laptop showing a video callVirtual appointmentsAn office interior with a desk and chairsIn-person services

Fees & payment

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Offices 2

100 King Street West, Suite 5600, Toronto, ON M5X 1C9

New York Office646-889-1020

165 Broadway, Floor 23, New York, NY 10006

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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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