Diana Hagen is an American lawyer and former Utah Supreme Court justice whose career spans federal prosecution, appellate law, legal education, and judicial leadership. Appointed to Utah’s highest court in 2022, she served until her resignation on May 8, 2026. Before joining the Supreme Court, she spent nearly five years on the Utah Court of Appeals and 17 years working as a federal prosecutor.

Her appointment represented an important moment for Utah’s judiciary, helping establish the first female majority on the state’s Supreme Court. Her career also attracted recognition for legal scholarship, professional leadership and community involvement.

Interest in Hagen increased in 2026 after questions about judicial ethics, public allegations, and her departure from the bench. Her story, however, extends far beyond that final chapter, encompassing nearly three decades of legal work.

Quick Bio

Detail	Information
Full Name	Diana Hagen
Profession	Lawyer and former judge
Known For	Former Utah Supreme Court justice
Hometown	Ogden, Utah, United States
Education	University of Utah
Law School	S.J. Quinney College of Law
Law Degree	Juris Doctor, 1998
Previous Profession	Federal prosecutor
Utah Court of Appeals	2017–2022
Utah Supreme Court	2022–2026
Supreme Court Appointed By	Governor Spencer J. Cox
Notable Recognition	2015 Alumna of the Year; 2017 Federal Bar Association Distinguished Service Award
Departure From Supreme Court	May 8, 2026

Who Is Diana Hagen?

Diana Hagen is a former appellate judge and federal prosecutor whose career focused on criminal appeals, constitutional questions, and public service.

She developed expertise in appellate litigation, the practice of reviewing decisions made by lower courts. Unlike trial courts, where witnesses provide evidence and juries may determine facts, appellate courts primarily examine legal arguments and the proper application of law.

This background became central to Hagen’s career. She worked extensively with written legal arguments and appellate proceedings before receiving judicial appointments.

Her work eventually led her to the Utah Supreme Court, the state’s highest court. In that role, she helped interpret Utah law and resolve significant legal disputes.

Early Life and an Unexpected Path Into Law

Growing Up in Ogden

Hagen grew up in Ogden, Utah, and attended Ben Lomond High School. She never originally planned to become a judge.

In an interview published by the University of Utah’s S.J. Quinney College of Law, she said she developed an early interest in acting and participated in speech, drama, debate, and theater.

She initially pursued acting studies in Los Angeles before transferring to the University of Utah. There, she chose speech communication as a more stable professional direction.

A university course examining freedom of speech changed her academic interests.

The subject introduced her to legal reasoning and constitutional questions. After completing her undergraduate studies in 1994, she took the Law School Admission Test and applied to law school.

What began as an unexpected possibility eventually became her profession.

Education at the University of Utah

Hagen enrolled at the University of Utah’s S.J. Quinney College of Law with scholarship support.

During her studies, she participated in the National Moot Court Team and served on the editorial board of the Utah Law Review.

Moot court competitions involve preparing legal arguments and presenting them before judges in simulated appellate proceedings. The experience offers practical training in legal writing, research, and oral advocacy.

She graduated in 1998 with Order of the Coif honors, an academic distinction awarded for outstanding achievement in legal education.

Her education helped establish the foundation for a career centered on appellate advocacy.

Building a Career in Federal Prosecution

After law school, Hagen worked as a law clerk for U.S. District Judge Tena Campbell.

Judicial clerkships give new lawyers experience researching legal issues, reviewing court filings, and assisting judges with legal analysis.

She subsequently entered private practice at the law firm now known as Parr, Brown, Gee & Loveless.

In 2001, Hagen joined the United States Attorney’s Office for the District of Utah.

That decision marked a significant transition from private legal practice into federal public service.

Seventeen Years as a Federal Prosecutor

During her federal prosecution career, Hagen handled hundreds of criminal appeals and participated in major criminal proceedings.

Her responsibilities included serving as chief of the office’s appellate section for nearly a decade before becoming First Assistant United States Attorney.

Her experience included work on proceedings involving the Elizabeth Smart kidnapping case and the murder of Millard County Sheriff’s Deputy Josie Greathouse Fox.

These high-profile cases formed part of a much broader record of federal criminal litigation.

The demanding nature of appellate work required close attention to trial records, federal statutes, constitutional arguments, and judicial precedent.

Her years in the U.S. Attorney’s Office built the professional background that later supported her appointment to Utah’s appellate judiciary.

Appointment to the Utah Court of Appeals

In June 2017, Governor Gary R. Herbert appointed Hagen to the Utah Court of Appeals.

The appointment represented her transition from presenting legal arguments as an attorney to evaluating arguments and deciding cases as a judge.

She served on that court until she was elevated to the Utah Supreme Court in 2022.

During her tenure, she also participated in judicial administration and professional oversight, including judicial education and work with the Utah Sentencing Commission.

Her performance received favorable assessments during the 2020 judicial retention review.

The official Utah voter information pamphlet reported that 93% of survey respondents recommended her retention. The Judicial Performance Evaluation Commission also recommended retaining her, with all 13 commission members voting in favor.

These assessments reflected her documented standing during that period of appellate service.

A Historic Appointment to the Utah Supreme Court

On March 29, 2022, Governor Spencer J. Cox announced Hagen as his choice to join the Utah Supreme Court.

She was nominated to fill the position left by Justice Deno Himonas.

Following the appointment and confirmation process, Hagen joined the state’s highest court.

A Milestone for Women in Utah’s Judiciary

The 2022 appointments of Hagen and fellow University of Utah graduate Jill Pohlman helped create the first female majority in the Utah Supreme Court’s history.

For a court established in the nineteenth century, that development was historically significant.

It also reflected the increasing representation of women in senior judicial positions.

Hagen’s appointment culminated her experience in private practice, federal prosecution, and appellate judging.

What Her Supreme Court Role Involved

As a justice, Hagen participated in the court’s consideration of legal appeals and questions involving the interpretation of state law.

Supreme Court decisions can set precedents that affect lower courts, government institutions, and the public.

The position therefore carries responsibilities extending beyond individual disputes. Justices must examine legal arguments independently, respect procedural requirements and maintain public confidence in judicial impartiality.

Hagen served on the court for approximately four years.

Leadership, Teaching and Professional Recognition

Hagen’s professional activities extended beyond courtroom litigation and judicial decision-making.

She taught appellate practice as an adjunct professor at the University of Utah’s S.J. Quinney College of Law and coached moot court teams.

Her teaching allowed law students to learn from someone experienced in both federal prosecution and appellate judging.

She also held leadership positions in several legal organizations, including Women Lawyers of Utah, the Salt Lake County Bar Association, the Utah Chapter of the Federal Bar Association, and the David K. Watkiss-Sutherland II Inn of Court.

Her professional and community contributions received several awards.

The University of Utah named her its law school’s Alumna of the Year in 2015. She received the Federal Bar Association’s Utah Chapter Distinguished Service Award in 2017.

In March 2024, the Utah State Bar recognized her with the Dorothy Merrill Brothers Award.

Earlier, in 2014, she received a Utah Philanthropy Day Heart & Hands Award for volunteer work with Girl Scouts of Utah.

Together, these distinctions illustrate the educational, professional, and community dimensions of her legal career.

Why Did Diana Hagen Leave the Utah Supreme Court in 2026?

On May 8, 2026, Hagen resigned from the Utah Supreme Court effective immediately.

Her resignation followed public reporting about allegations concerning a possible judicial conflict of interest involving an attorney associated with litigation over Utah’s congressional redistricting maps.

Hagen denied wrongdoing.

In a statement issued on April 17, 2026, the Utah Supreme Court explained that she last became involved in the relevant League of Women Voters case in October 2024. The court stated that Hagen later updated her recusal list and withdrew from further involvement.

The court also reported that the Utah Judicial Conduct Commission had reviewed the allegations and dismissed the complaint.

Despite that dismissal, the controversy continued, and political leaders raised questions about judicial oversight and accountability.

Her Resignation and Public Response

In her resignation letter to Governor Cox, Hagen expressed regret about leaving the court and maintained that she had fulfilled her judicial and professional obligations.

She cited concerns about the privacy and well-being of people close to her, as well as the effective functioning and independence of Utah’s judiciary.

The resignation was a voluntary departure from judicial office, not a reported court finding establishing the disputed allegations.

The distinction matters because allegations, investigative processes, and established findings are not interchangeable.

Following her departure, state officials began the process of filling the Supreme Court vacancy. A government announcement dated August 6, 2026, confirmed that her service ended on May 8.

Family and Personal Background

Hagen has spoken in public interviews about the practical challenges of combining professional responsibilities with family life.

In a University of Utah interview, she discussed how flexible working arrangements helped her continue her legal career while raising children.

She also explained that graduating without substantial law school debt gave her more freedom to make professional decisions, including accepting lower pay when she moved from private practice to government work.

Her 2026 resignation letter referred to the dissolution of her marriage and her desire to protect relatives and friends from further public attention.

Beyond the details relevant to her public statements and judicial career, speculation about personal relationships adds little to an accurate account of her professional achievements.

Why Diana Hagen Continues to Attract Public Interest

Interest in the former justice generally centers on three aspects of her career.

First, she spent nearly two decades in federal prosecution, including substantial appellate work and involvement in nationally recognized criminal cases.

Second, her appointment to the Utah Supreme Court contributed to a historic shift in the court’s gender representation.

Third, her May 2026 resignation generated discussion about judicial ethics, recusal procedures, and the relationship between judicial independence and public accountability.

These subjects explain why readers keep searching for information about her professional background, judicial service, and departure.

They also demonstrate why her biography should be considered in the context of her complete legal career rather than a single news event.

Privacy, Accuracy and Public Information

A responsible account of Hagen’s life should distinguish professional records, documented public statements and independently established findings from allegations or unsupported claims.

Her educational history, federal service, judicial appointments and professional awards are supported by institutional records.

The circumstances surrounding her resignation require particular care because they involve disputed allegations and sensitive personal matters.

A fact-based profile can explain the public significance of those events without treating unproven assertions as fact.

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FAQs

1. Who is Diana Hagen?

Diana Hagen is an American lawyer and former justice of the Utah Supreme Court. She previously served as a federal prosecutor and judge on the Utah Court of Appeals.

2. When did Diana Hagen join the Utah Supreme Court?

Governor Spencer Cox announced her nomination on March 29, 2022. She joined the court in 2022 and served until May 8, 2026.

3. Why did Diana Hagen resign?

She resigned on May 8, 2026, following controversy over allegations she denied. In her resignation letter, she cited concerns about family privacy and the independence and functioning of the judiciary.

4. Where did Diana Hagen study law?

She attended the University of Utah’s S.J. Quinney College of Law and earned her law degree in 1998, graduating with Order of the Coif honors.

5. What are Diana Hagen’s notable professional achievements?

Her achievements include 17 years as a federal prosecutor, service on two Utah appellate courts, leadership in legal associations, and several professional awards. Her appointment also contributed to the first female majority on the Utah Supreme Court.

Final Thoughts

Diana Hagen’s professional story reflects an unusual progression from an early interest in acting to leadership in the American legal system. Her work as a federal prosecutor, appellate judge, educator, and Supreme Court justice established a substantial record of public service.

Although her 2026 resignation became an important part of her public story, it does not erase the many years she spent practicing law, educating future attorneys, and serving on Utah’s judiciary.

Her career remains significant for its contributions to appellate law, professional leadership, and a historic period in the Utah Supreme Court’s development.