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About me

Attorney Costopoulos grew up in Mt. Lebanon, Pennsylvania.  She graduated from the University of Pittsburgh, cum laude, in 1989 with a B.A. in Political Science with minors in psychology, history, philosophy and sociology. She graduated from the Dickinson School of Law and was admitted to practice in Pennsylvania in 1993. Attorney Costopoulos has held associate positions with the law firms of Costopoulos Foster & Fields, Patrick F. Lauer, Jr. & Associates, and Maria P. Cognetti & Associates. Attorney Costopoulos was the managing partner of Costopoulos & Welch prior to establishing her main office in Mechanicsburg in 2003 representing clients exclusively in the field of family law.  In 2014, Attorney Costopoulos expanded her practice to Allegheny County.  In 2016, Attorney Costopoulos became affiliated "of counsel" with Ream, Carr, Markey & Woloshin, LLC, in York County with offices in Dover and downtown York. Attorney Costopoulos is a member of the family law sections of the Cumberland County, Dauphin County, York County, and Pennsylvania Bar Associations.  When not representing clients, Attorney Costopoulos enjoys spending time with family, spoiling her dog, experimenting in the kitchen with gluten-free and vegan recipes, organic vegetable gardening, kayaking, hiking, and mountain biking.  


Practice areas


  1. Child Custody: 50%
    23 years, 1.5 thousand cases
  2. Divorce: 45%
    23 years, 1.1 thousand cases
  3. Adoption: 5%
    23 years, 500 cases



Retainer (always)

Payment types:

Cash, Check, Credit card

Attorney endorsements

14 total 

Are you an attorney? Endorse this lawyer

  • Jonathan C Noble

    I endorse Ms. Costopoulos without reservation. Her answers on Avvo are insightful, caring, and spot on. I would not hesitate to contact her for any family law matter.


    Jonathan Noble Child custody Attorney
    Relationship: Fellow lawyer in community

  • Tara Lynn Hutchinson

    Jeanne is cordial and professional; the characteristics attorneys will look for in opposing counsel. Yet she has no hesitation in zealously representing her clients' interests. Her answers at Avvo demonstrate the depths of her knowledge and experience. Highly recommended for anyone looking for counsel in Central PA.


    Tara Hutchinson Child custody Attorney
    Relationship: Opposing Counsel on matter

Contact info

Law Office of Jeanne B. Costopoulos

5000 Ritter Road
Suite 202
Mechanicsburg, PA, 17055

Ream, Carr, Marke7 & Woloshin, LLP

119 E. Market Street
York, PA, 17401

Ream, Carr, Markey & Woloshin

53 E. Canal Street
Dover, PA, 17315



We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Association namePosition nameDuration
Pennsylvania Bar Association, Family Law SectionN/AN/A
Cumberland County Bar Association, Family Law SectionN/AN/A
York County Bar Association, Family Law SectionN/AN/A
Dauphin County Bar Association, Family Law SectionN/AN/A
School nameMajorDegreeGraduated
Pennsylvania State University, Dickinson School of LawLawJD - Juris Doctor1993
University of PittsburghPolitcal ScienceBA - Bachelor of Arts1989