Leo K. Barnes, Jr. is a commercial litigator at Barnes & Barnes PC in Melville, New York, with a focus on complex business litigation in Federal Court, the Commercial Division of the New York State Supreme Court, and various arbitration forums. Leo is an experienced jury and bench trial attorney for more than 24 years, and represents businesses of all sizes in complex commercial llitigation.

Leo  was the author of a regularly featured column for many years in the Suffolk Lawyer, he has been quoted in a variety of media outlets, and named a Super Lawyer every year since 2011. Leo Barnes received his undergraduate degree from Hofstra University in 1992, and his J.D. from Hofstra University School of Law in 1996. His local memberships include the Suffolk County Bar Association, and the Chaminade Lawyers Alumni Association. In 2021 he was the recipient of a Leadership in Law award by Long Island Business News. In January 2023, Leo was appointed to the Judicial Screening Committee for the Suffolk County Bar Association.