The 15 Most Influential Supreme Court Justices in History

What influence actually looks like

Influence on the Supreme Court leaves physical evidence. It looks like an opinion that lower courts must cite. It looks like a test, a framework, a phrase that later justices cannot write around. This ranking follows that evidence. Montgomery Kosma's 1998 study in the Journal of Legal Studies counted more than 1.2 million citations to over 24,000 opinions of the Court from 1793 to 1991, treating citations as a proxy for an opinion's continuing value (Kosma, Journal of Legal Studies, 1998). Fowler and Jeon's 2008 network analysis in Political Analysis mapped 30,288 majority opinions and the cases they cite from 1754 to 2002, scoring which precedents hold the web of case law together (Political Analysis, 2008). Both methods, built independently, keep finding the same names: Marshall, Holmes, Brennan, Story, Brandeis.

The five subscores under each entry are the components of that judgment made explicit. Landmark Opinions counts the controlling opinions a justice authored. Doctrinal Durability measures how long the justice's frameworks have governed. Citation Strength records standing in the empirical studies. Tenure counts years of service, verified against the Federal Judicial Center. Cross-Era Influence asks the hardest question: does the law still obey this justice beyond their own Court. A justice can be first in one column and mid-pack in another. Marshall leads because he is at or near the top of all five.

The framework pays no attention to which president appointed a justice. Warren was appointed by a Republican. Brennan was appointed by the same Republican. Black was appointed by a Democrat and Scalia by a Republican, and all four sit in the top eight because the law still obeys what they wrote. If that pattern produces discomfort in either political camp, the discomfort belongs to the camp, not the data. Only the written record was measured, and the written record does not carry a party registration.

Marshall stands alone

The gap between first and second place is the largest on the list. When John Marshall took the center chair in 1801, the Supreme Court had no building, little docket, and less prestige. John Jay had declined reappointment as chief justice in 1800, writing that the Court lacked energy, weight, and dignity. Marshall answered that in 34 years. Marbury v. Madison (1803) established that courts say what the law is. McCulloch v. Maryland (1819) established implied federal powers and the supremacy of federal law. Gibbons v. Ogden (1824) built the commerce power that the modern regulatory state stands on. All three still rank in the top tier of the Fowler and Jeon precedent network more than two centuries later (Political Analysis, 2008).

Marshall also changed how the Court speaks. Before him, justices issued separate seriatim opinions, each writing alone. Marshall pushed the Court toward a single opinion of the Court, usually written by him. He authored 508 majority opinions during his tenure, about 58 percent of everything the Court produced in those years, and he filed only six dissents (Supreme Court Historical Society). No justice before or since has so dominated the output of the institution. Every justice today works inside the structure Marshall built, deciding what the law is, speaking for the Court in one voice, and treating federal supremacy as settled. That is the definition of influence, and no one else on this list can match its scale. His five subscores are the only perfect or near-perfect line on the board.

The power of the vindicated dissent

Three of the top ten earned their rank partly by losing. Holmes lost in Lochner v. New York (1905); his dissent that the Fourteenth Amendment does not enact a particular economic theory became the governing view after the constitutional revolution of 1937. Harlan lost alone in Plessy v. Ferguson (1896); his color-blind Constitution arrived in Brown v. Board of Education (1954), 58 years after he wrote it and 43 years after his death (United States Reports). Brandeis lost in Olmstead v. United States (1928); his privacy dissent, defending the right to be let alone, was adopted in Katz v. United States (1967).

This is why the methodology counts vindicated dissents as influence, and why the Doctrinal Durability and Cross-Era columns reward them. A dissent that the full Court later adopts is a doctrine with a delayed start date. Hugo Black's Adamson dissent in 1947 argued that the Fourteenth Amendment applies the Bill of Rights to the states. The Court never adopted his total incorporation theory in one stroke, but by the 1960s it had incorporated nearly every major provision case by case, and Black wrote several of those opinions himself, including Gideon v. Wainwright (1963), which guaranteed a lawyer to every poor defendant facing prison (United States Reports). The record shows the Court moved to Black, not Black to the Court.

Stephen Field belongs in the same conversation for the opposite substance. His Slaughter-House (1873) and Munn v. Illinois (1877) dissents seeded substantive due process, the doctrine that let courts strike economic regulation for two generations before it collapsed in 1937 (United States Reports). Field ranks tenth not because his doctrine survives intact, much of it does not, but because a framework that governed the constitutional order for forty years is influence by any honest measure, and his nearly 35-year tenure gave it time to take root (Federal Judicial Center).

Method as a fingerprint

Two justices on this list are ranked chiefly for changing how every case is argued, not for a single holding. Antonin Scalia is the clearest modern example. Before Scalia, legislative history dominated statutory interpretation and originalism was a fringe academic position. After three decades of his opinions and dissents, briefs on both sides of nearly every major case now argue text and original meaning first. District of Columbia v. Heller (2008) is his landmark holding, the first to recognize an individual Second Amendment right, and Crawford v. Washington (2004) rebuilt the law of confrontation, but the method is the larger fingerprint. Justice Kagan's much-quoted 2015 remark that we are all textualists now, whatever its later qualifications, described a real shift in practice, which is why Scalia's Cross-Era subscore runs ahead of his tenure.

Felix Frankfurter is the mirror image. His doctrine of judicial restraint and his political question framework defined the terms of debate for the mid-century Court, even where he lost, as in Baker v. Carr (1962), where his dissent set the boundary the majority had to argue past (United States Reports). Frankfurter also worked through people: his Harvard students and former clerks carried his method into the profession for a generation. Joseph Story worked the same way a century earlier. Martin v. Hunter's Lessee (1816) settled the Court's power to review state courts on federal questions, the keystone that lets a single national law exist, and his Commentaries on the Constitution (1833) trained the lawyers who then argued before the Court. Method outlives membership, and the citation record shows it.

Reading the subscores

The five components explain why justices with similar reputations land in different places. Earl Warren and William Douglas both served long and both are household names, but their meters diverge. Warren scores 19 on Landmark Opinions because Brown, Reynolds, and Miranda are each a permanent fixture, while his Tenure column sits at 13 for a comparatively short 16 years. Douglas inverts that: his Tenure is a perfect 20 for the longest service in history, 36 years and 209 days, but his Landmark Opinions column is lower because Griswold, however consequential, is his one universally cited majority (Federal Judicial Center; United States Reports). Longevity and authorship are not the same currency, and the ranking refuses to let one stand in for the other.

Benjamin Cardozo is the sharpest test of the method. He sat for only six years, the shortest tenure on the list, and his Tenure subscore of 8 reflects it. Yet Palko v. Connecticut (1937) supplied the test for selective incorporation that governed for some 70 years, and his Citation Strength stays high because his common-law opinions, written before he ever reached Washington, remain among the most cited of any American judge (Kosma, Journal of Legal Studies, 1998). A justice can rank fifteenth on this list and still tower over most of the 100-plus who never made it. The bar for entry is a doctrine the law still follows, and Cardozo cleared it with years to spare.

Anthony Kennedy shows the limit of raw outcome power. He sat in the majority in roughly 94 percent of all cases and more often than any colleague on closely divided ones, and he authored a remarkable run of landmark opinions from Lawrence to Obergefell (Oyez; United States Reports). But his Doctrinal Durability subscore is a modest 12, because a jurisprudence built on case-by-case balancing rather than a single governing rule is easier for a later Court to narrow. Controlling the outcome of an era is not the same as writing the rule the next era must obey.

Who just missed, and why

Honest rankings show their close calls. Roger Taney authored Dred Scott v. Sandford (1857), arguably the most consequential opinion ever issued, but consequence through repudiation is not influence; the Fourteenth Amendment exists to erase his doctrine, and no court cites him for authority. Byron White wrote more than 990 opinions across 31 years but left no governing doctrine of his own. Sandra Day O'Connor controlled outcomes for two decades, yet her case-by-case balancing tests, such as the undue burden standard of Casey (1992), were dismantled within 20 years of her retirement, most directly by Dobbs v. Jackson Women's Health Organization (2022). Thurgood Marshall's world-historical influence came primarily as an advocate who won Brown, before he joined the Court.

Sitting justices are excluded by rule. The nine now serving, Chief Justice Roberts and Associate Justices Thomas, Alito, Sotomayor, Kagan, Gorsuch, Kavanaugh, Barrett, and Jackson, have authored opinions of plain historic scale, from the 2022 Dobbs and Bruen decisions to the 2024 rulings on presidential immunity and administrative deference (Supreme Court of the United States). Several will likely qualify in time. But a doctrine's durability cannot be scored while the Court that made it still sits, and the evidence is not in yet. This list only ranks evidence.

One more exclusion deserves a plain statement. Charles Evans Hughes served twice, as associate justice from 1910 to 1916 and as chief justice from 1930 to 1941, and steered the Court through the 1937 court-packing crisis. That was institutional leadership of the highest order, and it earns him a high place in a ranking of chief justices. But this list measures jurisprudential fingerprints, opinions and doctrines that still govern, and by that specific ruler his authored output trails the fifteen names above. Different questions produce different lists. This report answers exactly one question: whose written law still runs the country. The citation databases, the surviving doctrines, and the United States Reports supply the answer, and the answer does not care whose portrait hangs where.