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William Cullen McMahon
William Cullen McMahon is a lawyer in Dallas, TX who works for McMahon Dean, PLLC. Practice areas include Litigation: Personal Injury. Court admissions include Oklahoma Eastern District Court, Oklahoma Northern District Court. Licensed in Texas since 2011. Graduated from Oklahoma City University in 2005.
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Law school
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WM
William Cullen McMahon
McMahon Dean, PLLCDallas, TX·14 years licensed
Claim profileContact attorney
William Cullen McMahon is a lawyer in Dallas, TX who works for McMahon Dean, PLLC. Practice areas include Litigation: Personal Injury. Court admissions include Oklahoma Eastern District Court, Oklahoma Northern District Court. Licensed in Texas since 2011. Graduated from Oklahoma City University in 2005.
Law school
Oklahoma City University
Class of 2005
Bar admission
2011
State Bar of TX · #24079760
Office
4310 N Central Expy
Dallas, TX 75206
Disciplinary
None on record
Clean since admission
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Case data
Case data
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Practice, courts & credentials
Practice areas1 listed
Litigation: Personal Injury
Courts admitted7 total
Oklahoma Eastern District Court
Oklahoma Northern District Court
Oklahoma Western District Court
Texas Eastern District Court
Texas Northern District Court
Texas Southern District Court
Texas Western District Court
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Last refreshed Aug 2026