McDonald, Duncan, Doré LLP is a full-service law firm in Cornwall, Ontario, founded in 1998 by John McDonald and Bill Duncan. It's one of the largest law firms in the Cornwall and area community, with lawyers concentrating on business law, real estate, wills and estates, family law, and civil litigation, and services offered in both English and French.

Practice areas

Business & Corporate Law Real Estate Law Wills, Estates & Trusts Family Law Civil Litigation & Dispute Resolution

Good to know

A person using a wheelchairWheelchair accessible

Lawyers 4

Chelsey J. Cook Partner Family LawCivil Litigation & Dispute Resolution John H. McDonald Managing Partner Business & Corporate LawWills, Estates & Trusts R. William Duncan Founding Partner Real Estate LawWills, Estates & Trusts Valérie S. Doré Partner Business & Corporate LawReal Estate Law

This firm’s lawyers at a glance

Called to the bar
1973–2015 · median 31 years in practice 4 of 4 lawyers
Law schools
Bond University, Université de Moncton, University of New Brunswick, University of Windsor 4 of 4 lawyers
Languages on the roster
English, French

Who handles what

Where to find them

206 Pitt Street, Cornwall, Ontario K6J 3P6 · 613-938-2333

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Listing compiled from the firm’s public website in July 2026. Verify licence status in the Law Society of Ontario directory ↗