Personal Jurisdiction in US Courts: Where You Can Sue and Be Sued
By the BenchEvery American lawsuit must survive a question that has nothing to do with who is right: does this court have power over this defendant? In the United States the question is never a formality. The country operates more than fifty separate court systems, each answering to a state jealous of its own authority, and the federal Constitution polices the borders between them. A court without personal jurisdiction over you cannot bind you, however strong the claim against you — and a judgment entered without it is built on sand: open to attack where it was given, resistant to enforcement in other states, and vulnerable to refusal by courts abroad.
For a claimant, personal jurisdiction decides where you may sue — and picking a forum the defendant can knock out wastes a year and a filing fee. For a defendant, it decides where you can be made to answer — and the objection is perishable: raise it in your very first response or lose it for good. For a business outside the United States served with American process, it is usually the first line of defence and sometimes the only one worth the money.
This guide maps the doctrine in plain English — minimum contacts, general and specific jurisdiction, consent, long-arm statutes, the internet cases — and then the mechanics: how the challenge is actually made, how jurisdiction differs from venue, and what to do when a complaint from a distant state lands on your desk.
First, one distinction: power over the person, power over the case
Personal jurisdiction is the court's authority over the parties. It is not the same thing as subject-matter jurisdiction, which is the court's authority over the type of dispute — principally the line between what federal courts may hear (claims under federal law, and disputes between citizens of different states above a value threshold) and what belongs in the state courts, which can hear almost everything. Subject-matter jurisdiction protects the court system itself: it can never be waived and can sink a case at any stage. Personal jurisdiction protects the defendant, and the defendant can give it away. This article is about the second kind. One further orientation point: the question is asked state by state, and a federal court generally reaches only those defendants whom the courts of its host state could reach — so the analysis below governs both systems.
Minimum contacts: the framework from International Shoe
The modern law begins with International Shoe Co. v Washington, 326 U.S. 310 (1945). The Supreme Court held that the Due Process Clause allows a state to bind an absent defendant only where the defendant has minimum contacts with the state, of a kind that makes it fundamentally fair to require a defence there. Eighty years of case law since is commentary on those two ideas: contacts, and fairness.
Two refinements do most of the work in practice. The contacts must be purposeful. In World-Wide Volkswagen Corp. v Woodson, 444 U.S. 286 (1980), a New York car dealer could not be sued in Oklahoma just because a car it had sold was driven there and crashed: the bare foreseeability that a product might wander into a state is not enough. The defendant must have purposefully availed itself of the forum — courted its market, its customers or the protection of its laws. And the contacts must be the defendant's own contacts with the state, not the plaintiff's. In Walden v Fiore, 571 U.S. 277 (2014), a Georgia officer who allegedly wronged two Nevada residents could not be sued in Nevada: the plaintiffs felt their injury at home, but the defendant had directed nothing at Nevada itself.
From International Shoe grew two branches of jurisdiction, and everything downstream depends on which branch you are standing on.
General jurisdiction: where the defendant is at home
General jurisdiction means the court may hear any claim against the defendant, wherever in the world it arose. For an individual, that means the state of domicile — and, more startlingly, any state in which the individual is personally handed the court papers while physically present, however fleeting the visit: the Supreme Court confirmed this so-called tag jurisdiction in Burnham v Superior Court of California, 495 U.S. 604 (1990). An executive passing through a state on business or holiday can be served in the hotel lobby and thereby bound.
For companies, the old practice was to assert general jurisdiction wherever the company did continuous business — which, for a national retailer, meant everywhere. Daimler AG v Bauman, 571 U.S. 117 (2014) ended that. A corporation is now subject to general jurisdiction only where it is essentially at home: its state of incorporation and the state of its principal place of business, with a door left ajar for truly exceptional cases. Daimler itself could not be sued in California over events in Argentina merely because a subsidiary sold its cars in the state. The practical consequence is stark: for a claim with no connection to the forum, most companies can be sued in only two states — often Delaware, plus wherever the head office sits.
Specific jurisdiction: claims connected to the forum
Specific jurisdiction is narrower and does the everyday work. The defendant's purposeful contacts with the forum will support jurisdiction only over claims that arise out of or relate to those contacts. The Supreme Court has patrolled that connection from both directions in the last decade.
It tightened in Bristol-Myers Squibb Co. v Superior Court of California, 582 U.S. 255 (2017): hundreds of out-of-state claimants could not join a California suit over a drug they had bought, taken and allegedly been injured by entirely outside California. Each claim needs its own link to the forum; jurisdiction over one claimant's claim does not carry the rest.
It then loosened — deliberately — in Ford Motor Co. v Montana Eighth Judicial District Court, 592 U.S. 351 (2021). Ford was sued in Montana and Minnesota over crashes involving vehicles it had not designed, built or originally sold in those states, and the Court upheld jurisdiction anyway: Ford had systematically cultivated the market in each state for those very models — advertising, dealerships, parts, servicing — and residents were injured there by them. Relatedness, the Court made clear, does not demand a strict causal chain from forum contact to injury. The message for any business is legible enough: serve a state's market for a product deliberately and continuously, and expect to answer in that state when the product allegedly hurts someone there.
Consent: registration, contract clauses and conduct
All of the contacts analysis can be bypassed, because personal jurisdiction is a personal right, and rights can be given away. Consent comes in three forms.
Consent by corporate registration
In Mallory v Norfolk Southern Railway Co., 600 U.S. 122 (2023), the Supreme Court upheld, against a due-process challenge, a Pennsylvania statute under which an out-of-state company that registers to do business in the state consents to general jurisdiction there — for any claim, arising anywhere. Registration statutes vary considerably between states, and other constitutional objections to such schemes remain live, so this corner of the law is still moving. But after Mallory, consent-by-registration is firmly back on the table, and a company registered in dozens of states should read each state's fine print with fresh eyes.
Consent by contract
Forum selection clauses — advance agreement that disputes will be heard in a named state's courts — are routinely enforced in the United States, in commercial and consumer contracts alike. If you signed one, the question of where you can be sued has probably already been answered against you. The same instinct drives the arbitration clauses embedded in many American consumer and employment contracts, which move disputes out of court altogether — see our companion guide to forced arbitration in the US.
Consent by conduct
A defendant who appears and litigates the merits without objecting submits to the court's power. The trap is sprung early, as the mechanics below explain.
Long-arm statutes: the state-law overlay
The Constitution sets only the outer boundary. Each state then decides, through its long-arm statute, how far within that boundary its courts will actually reach. Some states — California is the classic example — extend their courts to the constitutional limit, collapsing the whole analysis into due process. Others, New York among them, enumerate specific jurisdiction-creating acts: transacting business in the state, committing a tortious act there, owning local property, and so on — and a claim must fit a listed category before the constitutional question even arises. Federal courts, for most claims, borrow the long-arm statute of the state in which they sit. Every real case therefore asks two questions in sequence: does the state statute reach this defendant, and does the Constitution allow it?
The internet: targeting beats accessibility
A website viewable in all fifty states does not create jurisdiction in all fifty states. The courts' traditional starting point is Zippo Manufacturing Co. v Zippo Dot Com, Inc., 952 F. Supp. 1119 (W.D. Pa. 1997), which ranged websites along a sliding scale — passive pages that merely display information at one end, sites that repeatedly transact business with forum residents at the other. Modern decisions increasingly ask the sharper question that Walden points to: did the defendant target the forum — ship goods to it, aim advertising at its residents, contract with them, direct allegedly defamatory content at an audience there — or is the site simply reachable from the forum in the way it is reachable from everywhere? Mere accessibility, without more, is not purposeful availment. For an online seller the working rule is blunt: a passive storefront creates little exposure, and every parcel shipped into a state builds jurisdiction there, parcel by parcel.
Challenging jurisdiction: Rule 12(b)(2) and the waiver trap
Under the old practice a defendant had to enter a special appearance — turning up solely to dispute jurisdiction, on pain of submitting by accident. Modern federal procedure abolished the ritual but kept the idea. Lack of personal jurisdiction is raised by a motion to dismiss under Federal Rule of Civil Procedure 12(b)(2), or as a defence stated in the answer. Rule 12 then makes the objection perishable: leave it out of your first motion or answer and, save for a narrow early-amendment grace, it is gone for good. Appearing to contest jurisdiction does not submit you; contesting the merits without raising the objection does. The first document you file decides the question — which is why jurisdiction strategy has to be settled before anything is filed, not after.
The mechanics are workable for both sides. The plaintiff bears the burden of establishing jurisdiction, but at the motion stage a prima facie showing on affidavits usually suffices. Where the facts about the defendant's contacts are genuinely disputed, the court can order jurisdictional discovery — a limited, targeted investigation of the defendant's dealings with the forum — before ruling. Losing the motion is not the end: the defendant may answer, defend the merits, and keep the jurisdictional objection alive for appeal. The wider mechanics of answering an American complaint — deadlines, motions, the shape of an answer — are covered in our guide to responding to a US lawsuit.
Venue and transfer are different questions
Personal jurisdiction asks whether a state's courts can bind you at all. Venue asks which court within the system should host the case. In the federal courts, 28 U.S.C. 1391 lays venue principally where a defendant resides or where a substantial part of the events occurred; improper venue is a separate objection, and it too is waived if not raised at the outset. Distinct again is transfer: under 28 U.S.C. 1404(a) a federal court may move a case to another federal district for the convenience of parties and witnesses and in the interests of justice, even though the original forum was perfectly proper. A defendant can therefore lose on jurisdiction and still win a transfer home — a smaller victory, but a real one: local jury, local counsel, shorter flights.
Forum non conveniens, in one paragraph
Where the genuinely better forum is not another American district but a foreign court, transfer is impossible and the doctrine of forum non conveniens allows outright dismissal in favour of an adequate alternative forum abroad — typically on conditions, such as the defendant undertaking to submit to the foreign court. It is discretionary and fact-heavy, and it is how many international disputes filed in the United States end. We examine the doctrine across the common law world in our dedicated guide to forum non conveniens stays, so one paragraph here is deliberate.
Served with American process: options, deadlines and the cost of default
If you are an out-of-state or foreign defendant with a US complaint in hand, you have three broad options, and a short clock. In federal court an answer or motion is generally due within 21 days of service — longer where formal service was waived, and longer again under some regimes for defendants served abroad — while state-court deadlines vary and can be shorter. Diary the date before you do anything else.
Option one: contest jurisdiction. Appear through counsel and move to dismiss under Rule 12(b)(2). You submit to nothing by doing so, you preserve every other defence, and for a defendant with thin forum contacts it is often the cheapest decisive motion available.
Option two: defend on the merits. If the contacts are plainly sufficient — you sold into the state for years, or you signed a forum clause — fighting jurisdiction burns money and credibility. Answer, and fight the case itself.
Option three: default deliberately. Some foreign defendants with no American assets ignore the proceedings, let default judgment enter, and plan to resist enforcement at home, where the local court will test the American court's jurisdiction by its own standards. The strategy can work, but understand what it is: a single bet, placed in advance, that forfeits the merits entirely. A default judgment accrues interest, follows you into any future American venture, and surfaces in due diligence for years. Choose it only on advice at both ends of the transaction — never by inertia.
Jurisdiction rewards cold, early analysis: map your actual contacts with the forum, check every contract for forum and arbitration clauses, and make the waiver deadline the first entry in the case diary. Ask CommonBench's Legal Chat to pressure-test personal jurisdiction on your facts — as a claimant choosing a forum, or a defendant deciding whether to fight it — with verified authorities behind every proposition.
This article is published by CommonBench for informational purposes only and does not constitute legal advice. Before you choose where to file, or decide how to answer a summons from a state you have never set foot in, try CommonBench — AI-powered legal research with verified citations across five common law jurisdictions.