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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

Publications and Presentations

Olivia was a guest speaker on an episode of the Podcast Business News Network.

Olivia participated in a discussion as a Purse Strings Approved Professional on a Money Monday virtual discussion, providing professional guidance and some tips for anyone in the middle of an emotional change.

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.

OSL’s List of Presentations of the Last Five Years

  • Presenter for The Lilac tree’s Pro se Guide to Divorce – January 2019
  • Panelist for the Lilac Tree’s Divorce University – March 2019
  • Panelist for Shalva Cares: Sexting, Revenge Porn and Cyberstalking: The Intersection of Technology and Domestic Abuse - April 2019
  • Panelist for GAL Webinar: Interviewing Children as a GAL – Sept 2020
  • Panelist on Chicago Volunteer Legal Services Virtual Panel on Best Practices for Attorneys Representing Children - November 2020
  • Presenter at Connections Health Webinar: Making Peace with your Divorce - February 2021
  • Presenter at The Lilac Tree's Divorce University: LGBTQ+ Considerations in Separation and Divorce - May 2022
  • Guest presenter on Legal Level Podcast - July 2022
  • Panelist on Life Transitions After Divorce Purse Strings Panel - October 2022
  • Guest presenter on Purse Strings Podcast Woman & Money: The Shit We Don’t Talk About How to Prepare Yourself for Divorce – Feb 2023