James Lockyer (born December 21, 1949) is a lawyer and a prominent social justice activist in Toronto, Canada. He is a founding director of the Association in Defence of the Wrongly Convicted (AIDWYC). He has been involved in exposing more than ten wrongful convictions in Canada, including the cases of Guy Paul Morin, David Milgaard, Clayton Johnson and Gregory Parsons. Several of these cases have become the subject of public inquiries.
Born in Orpington, England, he studied law at University of Nottingham but did not complete his studies there. In 1972 he accepted a scholarship to McGill University in Montreal where he finished his law degree and began teaching. Mr. Lockyer also taught law at the University of Windsor until 1977, when he went into private practice as a criminal lawyer. Lockyer is a former law partner with Edward H. Royle.
Mr. Lockyer has worked on behalf of Steven Truscott, whose 1959 conviction of the murder of Lynne Harper came under review by the Court of Appeal for Ontario, and of Robert Baltovich, whose murder conviction was quashed by the Ontario Court of Appeal in November, 2004. On August 28, 2007, the Ontario Court of Appeal acquitted Steven Truscott, concluding, "based on evidence that qualifies as fresh evidence in these proceedings, we are satisfied that Mr. Truscott's conviction was a miscarriage of justice and must be quashed". On April 22, 2008, Robert Baltovich was also acquitted in his retrial, after the Crown declined to present any evidence against him. Lockyer has twice been a candidate for the New Democratic Party. He ran federally in the Toronto riding of St. Paul's, first in the 1979 federal election and then in the 1980 federal election. He placed third on both attempts.
- Doctor of Laws, University of Victoria, 2009
- G. Arthur Martin medal for outstanding contribution to criminal justice, 2004
- Doctor of Laws, University of Windsor, 2015
- James Lockyer is the founding partner in LCP-Law. 
- Makin, Kirk (May 12, 1999). "James Lockyer is famous for clearing the wrongfully convicted. He's not so big on helping the guilty". Globe and Mail via Injusticebusters.org. Injusticebusters.org. Retrieved 24 November 2014.
- "CTV News - Top Stories - Breaking News - Top News Headlines". ctv.ca. Retrieved 5 March 2016.
- Small, Peter (23 April 2008). "Baltovich 'just glad it's over'". Toronto Star. Toronto Star Newspapers Ltd. Retrieved 24 November 2014.
- Honorary Degrees For Leaders In Arts, Business And Law, University of Victoria
- G. Arthur Martin Criminal Justice Medal, Criminal Lawyers Association website
- Eight luminaries to receive honorary degrees, University of Windsor website