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Mary Ann Plankinton

Mary Ann Plankinton


Tel: (302) 777-5353 x225
Fax: (302) 777-5299
Assistant: Lilia Soler

Mary Ann Plankinton practices family law as well as estate planning and administration in both Pennsylvania and Delaware.

Mary Ann Plankinton brings more than 20 years of experience to Gawthrop Greenwood with her multijurisdictional practice in Pennsylvania and Delaware focusing on family law (including divorce, support, custody and adoption) as well as estate planning and administration.

In addition to her regular practice, Mary Ann is a trained mediator and has successfully mediated cases in Pennsylvania and Delaware for family law disputes and estate matters. Representative cases include divorce matters involving family businesses, custody relocation, grandparent rights, will contests, guardianships and challenges to accountings.

Mary Ann is appointed by the Delaware Courts as a Guardian Ad Litem representing children placed in foster care, and she serves as a private Guardian Ad Litem for children when appointed by either the Delaware or Pennsylvania Courts. She chaired the Chester County Orphans’ Court Mediation Committee, working closely with the Courts to develop a mediation program, and is a certified mediator for the Orphans’ Court of Chester County.

A member of the Pennsylvania, Delaware and Chester County Bar Associations, Mary Ann received her law degree from Widener University School of Law and her undergraduate degree from Saint Joseph’s University. She is also a graduate of Ursuline Academy in Wilmington, Delaware. Named a top lawyer in 2014 and 2016 by Main Line Today, she was selected in 2012 by Delaware Today as a top lawyer in the state for Divorce, Trusts and Estates.

Mary Ann is a member of the North Captiva Civic Association and is active in the preservation of the island landscape and resident sea turtles. She is also a board member of Hope Springs Equestrian Therapy, which provides affordable therapeutic horseback riding to enhance the quality of life for individuals with cognitive , physical, emotional or behavioral disabilities. A member of the Pennsylvania Farm Bureau, she was instrumental in supporting Community Supported Agriculture (CSA) in Southern Chester County and continues to support this cause.

Related News & Law Articles

Practice Areas

Honors & Awards

  • Top Lawyers, Main Line Today Magazine, 2014, 2016-2020

Court Admissions

  • Supreme Court of Pennsylvania
  • Supreme Court of Delaware
  • Third Circuit Court of Appeals


  • Widener University School of Law
  • Saint Joseph’s University, B.S., Political Administration

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