John Anthony Castro

John Anthony Castro
NationalityUnited States
EducationTexas A&M International University (BA)
University of New Mexico (JD)
Georgetown University (LLM)
Harvard Business School (Certificate)
OccupationTax advisor
Known for
Political partyRepublican (2020–present)
Other political
affiliations
Democratic (before 2020)
Board member ofHarvard Business School Club of Washington, D.C. (former)

John Anthony Castro (born 1983) is an American tax advisor from Texas. He is known as the most prolific advocate for disqualifying Donald Trump from the 2024 U.S. presidential election under the Fourteenth Amendment to the United States Constitution, and for his involvement in Dixon v Commissioner and its related cases. In 2024, Castro was convicted of 33 counts of tax fraud as a result of filing fraudulent returns through his tax preparation service, Castro & Co.