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About Me

In 1980, Mark Olson began practicing family law in Seattle. Over thirty years of experience means wisdom and understanding. Mark has litigated complex, high-profile cases and quietly mediated cases; multimillion-dollar settlements to pro bono work. Mark has argued before the United States Supreme Court, Chaired the Family Law Section for the Washington State Trial Lawyers Association, is past president of the Northwest Children's Fund and served on the alumni board at The Lakeside School.


Practice Areas


  1. Divorce & Separation: 90%
    35 years, 3 thousand cases
  2. Marriage & Prenuptials: 10%
    35 years, 100 cases



Hourly ($330/hour)

Payment Types:

Cash, Check

Attorney Endorsements

6 total 

  • David Stanley Marshall

    It has been my privilege to share ideas on tactics and strategy with Mark. I've seen the creativity and insights he brings to his work for his clients. His experience and skill make him a leader among Seattle family law attorneys.


    David Marshall Child Abuse Attorney
    Relationship: Worked together on matter

  • Michael David Myers

    Mark's very sophisticated and at the top of the family law practice.


    Michael Myers Car Accidents Attorney
    Relationship: Worked together on matter

Contact Info

Olson & Olson, PLLC

1601 Fifth Avenue Suite 2200
Seattle, WA, 98101



Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
AV Peer Review RatingMartindale-Hubbell2014
AV Peer Review RatingMartindale-Hubbell2013
AV RatedMartindale-Hubbell2012
AV RatedMartindale-Hubbell2011
AV RatedMartindale-Hubbell2010
AV RatedMartindale-Hubbell2009
AV RatedMartindale-Hubbell2008
AV RatedMartindale-Hubbell2007
AV RatedMartindale-Hubbell2006
AV RatedMartindale-Hubbell2005
AV RatedMartindale-Hubbell2004
AV RatedMartindale-Hubbell2003
AV RatedMartindale-Hubbell2002
AV RatedMartindale-Hubbell2001
AV RatedMartindale-Hubbell2000
Life Member, National Registry of Who's WhoNational Registry of Who's Who2000
AV RatedMartindale-Hubbell1999
AV RatedMartindale-Hubbell1998
AV RatedMartindale-Hubbell1997
AV RatedMartindale-Hubbell1996
AV RatingMartindale-Hubbell1995
AV RatingMartindale-Hubbell1994
Work Experience
TitleCompany NameDuration
AttorneyOlson & Olson, PLLC2000 - Present
AttorneyLaw Office of Mark D. Olson, P.S.1996 - 2000
AttorneyJonson, Hurley, Olson & Olson, P.S.1980 - 1996
Association NamePosition NameDuration
Washington State Trial Lawyers AssociationPast Chairman Family Law1996 - 1997
King County Bar AssociationMember1980 - Present
Washington State Bar AssociationMember1980 - Present
Legal Cases
Case NameOutcome
Marriage of Hunter, 52 Wn. App. 265, 758 P.2d 1019 (1988);Trial Court reversed
Koher v. Morgan, 93 Wn. App. 398 (1998)Trial Court award to client affirmed
Troxel v. Granville 530 U.S. 57, 120 S. Ct. 2054 (2000)Grandparent's lost visitation rights but the Court set forth guidelines for States to follow for third party visitation statutes
See all Legal Cases 
Publication NameTitleDate
Trial News Washington State Trial LawyersMy Experience in the U.S. Supreme Court2001
King County Bar BulletinNon-Attorney Family Law Mediators in Court Ordered ADRN/A
School NameMajorDegreeGraduated
Gonzaga University School of LawLawJD - Juris Doctor1979
University of WashingtonMathematicsBA - Bachelor of Arts1976
Speaking Engagements
Conference NameTitleDate
What Family Court Judges Want You to KnowFamily Law Judical Panel2012
13th Family Law ConferenceProtecting Children's relationships2009
Family Law in WashingtonFamily Law2004
10th Annual Family Law InstituteSpousal Maintenance2003
WSTLA Annual ConferenceChild Support Exptrapolation2002
Superior Court Judges Spring ProgramThird Party Visitation2001
WFLR Family Law ConferenceMeretricious Relationships1999