Based in Shawnee

Serving all of Oklahoma

Practical solutions to legal issues


Shawnee Shawnee Office building

Background of Firm and Areas of Practice

The firm of Henson & Marshall, PLLC, has been at its current location of 101 W. 9th Street, Shawnee, OK, since 1986. Our attorneys are Karen Henson, Jim Marshall, and Drew O’Gwynn.  The firm currently primarily practices in the areas of estate planning, probates and guardianships, trusts, real estate, business law and family law.  


The predecessor to the current firm was begun in 1948 when Almon Henson, as a graduate of the University of Oklahoma School of Law, located in Shawnee, OK.  Almon Henson served as County Attorney for Pottawatomie County from 1950 to 1952, and then chose to return to private practice.  Ultimately, Karen joined her dad, and then her husband, Jim Marshall, joined the firm after leaving active duty as an Air Force JAG. Drew O’Gwynn joined the firm in 2013 as an associate attorney.


Strong Legal Representation Anchored in the Community

Our attorneys have a broad range of professional and personal experience resulting in strong, practical legal representation. Our firm is anchored in the community and traces its roots back to 1948 when World War II veteran and Oklahoma University Law School graduate Almon E. Henson and his wife, Helen, established their home, and his law practice, in Shawnee, Pottawatomie County, Oklahoma.

We have provided Shawnee, OK with reliable legal

services since 1948.

Values and Client Base

One of our core values is that our attorneys be invested in our community and state, living and working among the people we are privileged to represent.  


Our priority is to provide dependable legal services that are anchored in integrity and practical solutions.


Our client base ranges from individuals and multi-generational families to small proprietorships, agriculturally-based clients, large corporations, and financial and educational institutions.


Contact us for more information about our

legal services.