Law Office of William B. Doonan - a Keller, Texas (TX) Family Law Firm

Keller Family Law Firm

Updated: 02/16/2026

Areas of Practice

Family Law
Adoption
Child Support
Custody
Divorce
Enforcement
Guardianship
Probate
Wills

Firm Information

Overview

William B. Doonan is the founder of the law firm “Law Office of William B. Doonan.” Mr. Doonan made a decision early on in his practice of law to focus on family law and furthered strengthened that decision by becoming Board Certified in Family Law by the Texas Board of Legal Specialization. He saw the need for excellent representation in matters dealing with children, divorces and all the intricacies involved with such matters of the heart. Every situation is different, vital and deserving of detailed attention as the results of family cases have far reaching, life-changing effects on families and children. With offices in both Midland and Keller, Texas, Mr. Doonan is able to provide representation in all areas of family law to select client throughout the Permian Basin, Tarrant County and other parts of the greater Dallas-Fort Worth metropolitan area. Mr. Doonan has been admitted to practice law in Texas since 2009, and he is also admitted to practice before the U.S. District Court for the Western District of Texas and the U.S. Court of Appeals for the 5th Circuit.

Mr. Doonan’s family law client base is largely comprised of people whose marriages are on the verge of termination. During this process, Mr. Doonan assists husbands and wives with child custody and possession rights, the division of community property, the preservation of separate property, the allocation of marital assets and debts, allowing for the past, current and future circumstances, and negotiating child support, spousal support and alimony. He brings personal attention to every case, advocating zealously for his client’s best interest. With a forceful and knowledgeable courtroom presence, he expertly guides and represents his clients through courtroom litigation when negotiations have broken down and mediation has not been successful. Many issues can arise post-divorce, and Mr. Doonan represents his clients in these instances, such as modifying a prior order, or enforcing aspects of a prior order when an opposing party refuses to comply.

In an effort to ensure his clients are adequately prepared for the future, Mr. Doonan prepares and reviews wills and other estate planning documents for his clients, which need to be revised after a divorce. He represents his client through the administrative process of probate filings, and offers guardianship proceedings when necessary. Highly regarded by his colleagues, Mr. Doonan has received a 10.0 “Superb” peer review rating through Avvo. He attended The University of Texas Permian Basin and received a Bachelor of Science in mathematics and a Bachelor of Arts in political science, both cum laude, and he holds a Juris Doctor from Texas Tech University School of Law.

Awards and Honors

Honors

Board Certified in Family Law
Texas Bar College
Top 40 Under 40
Top 10 Under 40
Texas Academy of Family Law Specialists
National Academy of Family Lawyers
National Advocates
American Institute of Family Law Attorneys
Midland County Bar Association
Tarrant County Bar Association
State Bar of Texas
5th Circuit of Appeals
United States District Court for the Western District of Texas
Christian Legal Society
Deans List - Texas Tech University School of Law
International High IQ Society
Best Family Lawyers Fort Worth 2020
Top 3 Divorce Lawyers in Midland
Top 10 Family Law Attorney 2020
Top 10 Family Law Attorney and Practice Magazine's
Received recognition due to pro bono assistance., Pro Bono Certificate of Appreciation, Legal Aid of NorthWest Texas (LANWT), 2017

Classes and Seminars

Gave a presentation at the Family Law Essentials CLE seminar on Temporary Orders. I was selected due to my board certification., Speaker, Family Law Essentials CLE, 2015.

Pro Bono Activities

Was employed by Legal Aid of NorthWest Texas from 2010 - 2012. Since that point I have been involved with Legal Aid and their pro bono clinics. Further, I have accepted cases on a pro bono basis from Legal Aid's Equal Justice Volunteer Program (EJVP).

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Contact

Keller, TX

807 Bluebonnet Dr.
Suite C
Keller, TX 76248

Directions

Phone: 817-898-7242

Email: Send a message

Websites:

Hours: Monday-Thursday: 9:30AM-12:00PM, 1:00PM-5:30PM; Friday: 9:30AM-12:00PM

Credit Cards Accepted

Additional Texas Locations

Midland, TX (Main Office, 289.6 miles)

1120 N. Big Spring
Midland, TX 79701

Directions

Phone: 432-570-9949

Email: Send a message

Website: https://www.wdoonanlaw.com

Hours: Monday-Thursday: 9:30am-5:30pm, Friday: 9:30am-12:00pm

Credit Cards Accepted

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Law Office of William B. Doonan - Keller, TX