---
title: "Judiciary Act of 1789 — APUSH Definition & Exam Guide"
description: "The Judiciary Act of 1789 built the federal court system under Washington, creating the Supreme Court and lower courts. A key precedent in APUSH Topic 3.10."
canonical: "https://fiveable.me/apush/key-terms/judiciary-act-of-1789"
type: "key-term"
subject: "AP US History"
unit: "Unit 3"
---

# Judiciary Act of 1789 — APUSH Definition & Exam Guide

## Definition

The Judiciary Act of 1789 was the law passed by the first Congress that built the federal court system the Constitution only sketched out, creating a six-justice Supreme Court, lower federal courts, and the Attorney General, and setting a major precedent for putting the Constitution into practice.

## What It Is

Article III of [the Constitution](/apush/unit-3/constitution/study-guide/GFXLutGBoLM4MszJCxWq "fv-autolink") says there shall be "one [Supreme Court](/apush/key-terms/supreme-court "fv-autolink")" and whatever lower courts Congress decides to create. That's it. The Constitution left the entire structure of the judicial branch blank, and the Judiciary Act of 1789 filled it in. Passed by the very first Congress and signed by George Washington, the act created a Supreme Court with six justices (one Chief Justice and five associates), set up federal district and circuit courts below it, and established the office of Attorney General.

For [APUSH](/apush "fv-autolink"), the act matters less as a piece of legal trivia and more as an example of a bigger pattern. The CED's essential knowledge for Topic 3.10 (KC-3.2.III.A) says that leaders under Washington and Adams "created institutions and precedents that put the principles of the Constitution into practice." The Judiciary Act is one of the cleanest examples of that idea. The Constitution was a blueprint, and the 1790s were when the actual building got constructed. The Judiciary Act also gave the Supreme Court the power to review certain state court decisions involving federal law, an early move toward making national law supreme over state law in practice, not just on paper.

## Why It Matters

This term lives in **[Unit 3](/apush/unit-3 "fv-autolink"): [Independence](/apush/unit-3/context-american-independence/study-guide/9iJasxNtHYt2SBpTnTfL "fv-autolink") and Nation-Building (1754-1800)**, specifically **Topic 3.10: Shaping a New Republic**. It directly supports learning objective **APUSH 3.10.B**, which asks you to explain how and why political ideas and institutions developed and changed in the new republic. The Judiciary Act is your go-to evidence that Washington's administration didn't just inherit a working government. Congress had to invent one, branch by branch.

It also connects to the era's central tension over national versus state power. [Federalists](/apush/key-terms/federalists "fv-autolink") like Alexander Hamilton wanted a strong national government, and a real federal court system was part of that vision. So even a structural law like this one feeds into the partisan fights that produced the first party system. For the exam, the act is a precedent-setting institution you can cite in any argument about how the Constitution went from words to working government.

## Connections

### Judicial Review and Marbury v. Madison (Unit 4)

The Judiciary Act of 1789 is literally the law at the center of [Marbury v. Madison](/apush/key-terms/marbury-v-madison "fv-autolink") (1803). John Marshall ruled that a section of the act conflicted with the Constitution and struck it down, establishing judicial review. So the law that created the courts also became the law the courts used to claim their biggest power.

### [Bill of Rights (Unit 3)](/apush/key-terms/bill-of-rights)

The same first Congress that passed the Judiciary Act also drafted the [Bill of Rights](/apush/key-terms/bill-of-rights "fv-autolink") in 1789. Pair them as evidence that 1789 was the year the new government turned constitutional promises into concrete institutions and protections.

### [Federalism (Unit 3)](/apush/key-terms/federalism)

By letting the Supreme Court review state court decisions on federal questions, the act made federal supremacy enforceable. It's federalism in action, deciding in practice where state power ends and national power begins.

### George Washington's Precedents (Unit 3)

The act fits alongside Washington's cabinet and Hamilton's financial plan as part of the precedent-setting flurry of the early 1790s. KC-3.2.III.A is basically asking you to know examples like this one.

## On the AP Exam

On multiple choice, expect significance questions like "What was the significance of the Judiciary Act of 1789?" The answer they want is structural. The act organized the judicial branch the Constitution left undefined, not something about judicial review (that comes later, with Marbury). It can also appear in stems about how Washington-era leaders turned constitutional principles into working institutions.

No released FRQ has used this term verbatim, but it's strong supporting evidence for LEQ or SAQ prompts about the development of political institutions in the new republic (LO 3.10.B), or for a continuity-and-change argument about the growth of federal power from the 1790s through the Marshall Court. The move that earns points is connecting it forward, since citing the act and then explaining how Marbury v. Madison used it to establish judicial review shows the cross-period thinking graders reward.

## Judiciary Act of 1789 vs Article III of the Constitution

Article III authorized a federal judiciary; the Judiciary Act of 1789 actually built it. The Constitution only required "one Supreme Court" and left everything else to Congress. The act supplied the details, including the six-justice Court, district and circuit courts, and the Attorney General. If a question asks what *created* the federal court structure, the answer is the act, not the Constitution itself.

## Key Takeaways

- The Judiciary Act of 1789 was passed by the first Congress to build the federal court system that Article III of the Constitution only outlined.
- It created a six-justice Supreme Court, lower federal district and circuit courts, and the office of Attorney General.
- It's a prime example of KC-3.2.III.A, the idea that Washington-era leaders created institutions and precedents that put the Constitution into practice.
- A section of this act was struck down in Marbury v. Madison (1803), which established judicial review, so the act connects Unit 3 directly to Unit 4.
- By allowing federal review of state court decisions on federal law, the act strengthened national power over the states, feeding the Federalist versus Democratic-Republican debate.

## FAQs

### What did the Judiciary Act of 1789 do?

It organized the federal judicial branch by creating a Supreme Court with six justices, establishing lower district and circuit courts, and setting up the office of Attorney General. The Constitution had left all of these details to Congress.

### Did the Judiciary Act of 1789 create judicial review?

No. Judicial review came from Marbury v. Madison in 1803, when John Marshall struck down a section of the Judiciary Act itself. The 1789 act built the court system; Marbury defined its power to declare laws unconstitutional.

### How is the Judiciary Act of 1789 different from Article III of the Constitution?

Article III (1787) authorized a Supreme Court and let Congress create lower courts, but gave almost no details. The Judiciary Act (1789) is the law Congress passed to actually fill in that structure, from the number of justices to the layout of lower courts.

### Why is the Judiciary Act of 1789 important for APUSH?

It's textbook evidence for Topic 3.10 and learning objective 3.10.B, showing how leaders under Washington created institutions that put the Constitution into practice. It also sets up Marbury v. Madison and arguments about growing federal power.

### How many Supreme Court justices did the Judiciary Act of 1789 create?

Six, one Chief Justice and five associate justices. The number isn't fixed in the Constitution, so Congress has changed it over time, eventually settling at nine.

## Related Study Guides

- [3.10 Shaping a New Republic](/apush/unit-3/shaping-new-republic/study-guide/jDcJK92nIldkFTb5QJpZ)

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