Justice Sonia Sotomayor is an Associate Justice of the Supreme Court of the United States, confirmed in August 2009 as the first person of Hispanic heritage and the first Latina to serve on the nation’s highest court, and only the third woman ever appointed to it.1National Museum of the American Latino. Sonia Sotomayor Nominated by President Barack Obama to replace the retiring Justice David Souter, she has spent more than fifteen years on the Court writing majority opinions, concurrences, and some of the most widely quoted dissents in modern Supreme Court history.
From the Bronx to the Federal Bench
Sotomayor was born on June 25, 1954, and grew up in the Bronxdale Houses, a public housing project in the South Bronx. Both of her parents were Puerto Rican. Her father died when she was nine, and her mother, a nurse, raised Sotomayor and her younger brother largely on her own. At age seven she was diagnosed with Type 1 diabetes and learned to manage her own insulin injections, a detail she has returned to often in her own writing.
She graduated summa cum laude from Princeton University in 1976 with a degree in history, then earned her Juris Doctor from Yale Law School in 1979, where she served as an editor of the Yale Law Journal.2United States Senate Committee on the Judiciary. Associate Justice of the U.S. Supreme Court – Sonia Sotomayor
Her first legal job was as an assistant district attorney in the Manhattan District Attorney’s Office, where she spent five years prosecuting cases ranging from robbery to child abuse.3Justia. Justice Sonia Sotomayor In 1984 she moved into private practice, focusing on commercial litigation and intellectual property, including anti-counterfeiting work for fashion brands.
President George H.W. Bush nominated her to the U.S. District Court for the Southern District of New York in 1991, and the Senate confirmed her the following year.2United States Senate Committee on the Judiciary. Associate Justice of the U.S. Supreme Court – Sonia Sotomayor Her best-known trial court ruling came in Silverman v. Major League Baseball Player Relations Committee, Inc., where she issued an injunction requiring team owners to honor the expired collective bargaining agreement and to bargain in good faith with the players’ union.4Justia. Silverman v. Major League Baseball Player Relations Committee, Inc. The order effectively ended the 1994–1995 baseball strike, which had canceled the World Series for the first time in ninety years.
President Bill Clinton nominated her to the U.S. Court of Appeals for the Second Circuit in 1997, and she was confirmed the following year.2United States Senate Committee on the Judiciary. Associate Justice of the U.S. Supreme Court – Sonia Sotomayor Over the next decade she handled civil rights, immigration, corporate, and criminal appeals, giving her an unusually broad federal record by the time her name reached the Supreme Court.
Nomination and Confirmation
President Obama announced Sotomayor as his Supreme Court nominee on May 26, 2009.2United States Senate Committee on the Judiciary. Associate Justice of the U.S. Supreme Court – Sonia Sotomayor The American Bar Association’s Standing Committee on the Federal Judiciary unanimously gave her its highest rating, “Well Qualified.”5American Bar Association. Sonia Sotomayor
Much of the Senate Judiciary Committee hearing centered on a 2001 speech she gave at the University of California, Berkeley, in which she said, “I would hope that a wise Latina woman with the richness of her experiences would more often than not reach a better conclusion than a white male who hasn’t lived that life.” Critics asked whether personal identity would override neutral legal reasoning. Sotomayor told senators the line was a poor choice of words meant to inspire young lawyers, not a claim about judicial superiority.
The Senate confirmed her by a vote of 68 to 31. She was sworn in on August 8, 2009, becoming the 111th justice in the Court’s history.1National Museum of the American Latino. Sonia Sotomayor
How She Approaches Cases
Sotomayor sits with the liberal wing of the Court. Her constitutional approach aligns with what scholars call a “living Constitution” framework: broad principles applied to circumstances the Framers could not have foreseen. When interpreting statutes, she looks closely at what Congress was trying to accomplish and whether a proposed reading would undercut that purpose.
Her years as a trial judge show through in her writing. Judges who have sat across from witnesses and crime victims tend to think concretely about consequences, and her opinions frequently return to the real-world fallout of a ruling rather than treating a case as a purely intellectual exercise. That tendency runs through her work in criminal sentencing, immigration, and executive power.
Notable Majority Opinions
Peugh v. United States
In Peugh v. United States (2013), Sotomayor wrote the majority opinion holding that sentencing a defendant under federal guidelines revised after the crime, where the revision produces a harsher range, violates the Ex Post Facto Clause.6Justia U.S. Supreme Court Center. Peugh v. United States The government argued that because the guidelines are advisory rather than mandatory, they lack the force of “law” for ex post facto purposes. Sotomayor rejected that argument, explaining that the guidelines still anchor a judge’s sentencing decision and that a retroactive increase creates a real risk of a longer prison term the Constitution does not permit.7Legal Information Institute. Peugh v. United States
DHS v. Regents of the University of California
In Department of Homeland Security v. Regents of the University of California (2020), the Court ruled 5–4 that the Trump administration’s attempt to end the Deferred Action for Childhood Arrivals (DACA) program was arbitrary and capricious under the Administrative Procedure Act. Chief Justice Roberts wrote the majority, holding that the government had not adequately explained ending a policy on which hundreds of thousands of people had built their lives.8Supreme Court of the United States. Department of Homeland Security v. Regents of the University of California Sotomayor joined most of the opinion but wrote separately to argue that the rescission was also motivated by discriminatory animus toward Latinos, citing public statements by administration officials. Her concurrence pushed the equal protection question further than the majority was willing to go.
Dissents That Shaped the Record
Sotomayor’s dissents are among the most widely read on the current Court. Several have been treated as blueprints for future legal challenges rather than mere disagreements with the majority.
Utah v. Strieff
In Utah v. Strieff (2016), the majority held that evidence found during an unlawful police stop could still be used in court if the officer discovered an outstanding arrest warrant during the encounter. Sotomayor dissented, writing: “This case allows the police to stop you on the street, demand your identification, and check it for outstanding traffic warrants — even if you are doing nothing wrong.”9Legal Information Institute. Utah v. Strieff She pointed out that Utah’s database contained more than 180,000 outstanding misdemeanor warrants, making the “discovery” of a warrant a near-statistical certainty for any stop rather than an intervening surprise. The closing passage, in which she wrote that the decision treats citizens as “the subject of a carceral state, just waiting to be cataloged,” became one of the most quoted passages in recent Supreme Court writing.
Trump v. Hawaii
In Trump v. Hawaii (2018), the Court upheld a presidential proclamation restricting entry from several predominantly Muslim countries. Sotomayor dissented, arguing that the policy violated the Establishment Clause’s requirement of religious neutrality. She drew a direct comparison to Korematsu v. United States, the 1944 decision upholding Japanese American internment, writing that both cases involved the government invoking “an ill-defined national-security threat to justify an exclusionary policy of sweeping proportion.”10Supreme Court of the United States. Trump v. Hawaii The majority formally overruled Korematsu in the same decision; Sotomayor argued the Court was repeating the mistake it claimed to repudiate.
Trump v. United States
In Trump v. United States (2024), the Court’s conservative majority held that former presidents enjoy broad immunity from criminal prosecution for official acts taken while in office. Sotomayor dissented, joined by Justices Kagan and Jackson, warning that the ruling placed presidents above the law and left no meaningful check on executive misconduct.
Writing and Public Presence
Sotomayor published her memoir, My Beloved World, in January 2013. It covers her childhood in the Bronx, her father’s death, her experience managing diabetes from age seven, and her path through Princeton and Yale to the federal bench. The book deliberately stops before her Supreme Court nomination and focuses on the personal history that shaped her outlook. It became a bestseller.
She has also written several children’s books, including Turning Pages, Just Ask! Be Different, Be Brave, Be You (2019), and Just Help! How to Build a Better World. Just Ask! encourages children to talk openly about differences and disabilities, drawing on her own experience growing up with Type 1 diabetes. The Bronx housing project where she grew up was renamed the Justice Sonia Sotomayor Houses in her honor.