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Olivia St. Clair Long headshot

Founder & Principal Attorney

St. Clair

Olivia practices family law to help others add value to their lives.

“I want clients to know they can get closure after a dispute: they can be financially secure, and their kids will be ok.”

Olivia noticed that too many firms do not provide clients the tools they need to make good decisions in their family law disputes. She wanted to correct that. In divorce, clients should have information and support so they understand the process and don’t feel intimidated into making deals just to get things over with. So, with considerable litigation experience gained from working in large law firms, a command for high-stakes negotiation, and a no-nonsense approach to protecting families, Olivia founded O. Long Law.

“My job is to explain what you’re going through. I do it by listening, paying attention to your needs, and crafting a plan that you help control.”

Often praised for her straight answers, clear options, and creative legal solutions, Olivia leverages her skills to assist people going through the trauma of divorce, domestic violence, and disputes involving custody and child support. Whenever possible, she seeks opportunities for mediation and negotiation. But, Olivia is an aggressive advocate who’s always ready to fight for her clients, their children, and their financial well-being.

In college, Olivia was a letterwinner in rowing and a Big XII Scholar-Athlete. She enjoys singing and can often be found helping to stage the musical benefit show at the Woman’s Club of Evanston. She lives in Evanston with her wife, kid, two cats, and a pit bull named Westside. Olivia also enjoys traveling the world to watch her stepson compete in karate.


  • University of Chicago, J.D. 2009 (Semi-Finalist, Hinton Moot Court)
  • University of Texas, B.A. 2004

Bar Admissions

  • Illinois
  • California

Awards & Memberships

  • Illinois State Bar Association: Committee on Sexual Orientation & Gender Identity
  • Lesbian and Gay Bar Association of Chicago: Judicial Evaluation Committee
  • University of Chicago’s Graduate Student Legal Services Liaison
  • Of Counsel at Kobre Kim assisting with Chicagoland commercial litigation matters.

Publications and Presentations

Olivia participated in a discussion as a Purse Strings Approved Professional on a Money Monday virtual discussion.

Olivia moderated a virtual panel discussion with Chicago Volunteer Legal Services on the topic of best practices for attorneys representing children.

Olivia presented on LGBTQ+ considerations in separation and divorce as part of The Lilac Tree's Divorce University virtual conference.

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  • Olivia partnered with Connections Health to share her perspective in a webinar about emotionally processing divorce and promoting mental wellbeing during a strenuous time.

  • Jelena and Branden interview family law attorney Olivia St. Clair-Long, the Founder and Principal Attorney at O. Long Law in Evanston, Illinois.