Yes, a small amount of land that no one owns still exists on Earth, but the list is short and none of it is available for you to claim. The two real examples on land are Marie Byrd Land in western Antarctica and Bir Tawil, a stretch of desert sitting between Egypt and Sudan. Outer space and the deep ocean floor are also closed to national ownership by treaty. Everywhere else, international borders and domestic property systems have long since filled in the map.
The Legal Idea Behind Unowned Land
International law uses the Latin phrase terra nullius for land that belongs to no sovereign. European powers leaned on the doctrine during the colonial era to justify taking territory through discovery and occupation. It still exists in legal theory, but its practical reach has nearly vanished. To invoke it today, a country would have to show the land was never under any prior government’s control or was deliberately abandoned, and almost no spot on the globe fits that description. Virtually every habitable acre sits inside internationally recognized borders backed by treaties, UN membership, and decades of administrative control.
Marie Byrd Land
The largest piece of genuinely unclaimed territory on the planet is Marie Byrd Land, a roughly 620,000-square-mile wedge of western Antarctica. That is bigger than Alaska. Seven countries divided Antarctica into pie-shaped claims during the early twentieth century, but this slice was too remote for any of them to annex before the rules changed.
Those rules came with the Antarctic Treaty, signed in 1959 and now joined by 58 countries.1Antarctic Treaty System. The Antarctic Treaty Article IV froze every existing territorial claim and barred any new ones: nothing done while the treaty is in force creates rights of sovereignty in Antarctica, and no country can enlarge an old claim or assert a new one.2U.S. Department of State. Antarctic Treaty Marie Byrd Land was unclaimed before the freeze, so under the current framework it stays unclaimed indefinitely. No individual, company, or government can legally acquire title to any part of it.
Unclaimed does not mean unregulated. U.S. citizens heading to Antarctica need permits under the Antarctic Conservation Act for activities as modest as collecting rocks, and the Marine Mammal Protection Act layers on separate authorization requirements. The label “no one owns it” is accurate; “no rules apply” is not.
Bir Tawil
On a populated continent, the only patch of ground that genuinely has no government is Bir Tawil, roughly 795 square miles of desert between Egypt and Sudan. Neither country wants it.
The reason is a colonial-era mapping dispute. In 1899, Britain drew the Egypt-Sudan border along the 22nd parallel. Three years later, a separate British administrative boundary shifted control of certain areas to track local tribal patterns. The two lines disagree, and each country prefers the version that gives it the far larger and more valuable Hala’ib Triangle to the east. Claiming Bir Tawil would mean accepting the border that hands the Hala’ib Triangle to the other side, so both governments leave Bir Tawil alone.
A handful of travelers have hiked in, planted homemade flags, and declared themselves kings of new nations. None of it holds up. Under the 1933 Montevideo Convention, a functioning state needs a permanent population, a defined territory, a working government, and the capacity to conduct relations with other states.3Yale Law School Avalon Project. Convention on Rights and Duties of States (Inter-American) One person with a flag meets none of those criteria, and no existing country has recognized any of the claims.
Getting there is also not a casual trip. The U.S. State Department classifies Egypt’s border areas with Sudan as restricted military zones and advises Americans not to travel there; access requires advance permission from Egyptian Military Intelligence and the Tourist Police, and emergency assistance from the U.S. government is limited.4Travel.State.Gov U.S. Department of State. Egypt Travel Advisory The surrounding countries pay close attention to who crosses their borders even when they refuse to govern the land in between.
Why You Cannot Claim Any of It
This is where most people’s plans fall apart. Even where unowned land genuinely exists, no legal pathway lets a private individual claim sovereignty over it. International law treats territorial claims as something only states can make, and only through processes other states accept. The Montevideo requirements are a floor; real recognition depends on diplomacy, not declarations.
Hundreds of self-declared micronations exist, some with elaborate websites, currencies, and passports. Not one has been recognized by any established government or international organization. Declaring sovereignty from your living room, or standing in the Bir Tawil desert with a flag, creates no obligation for anyone else to respect it. You remain a citizen of your home country, subject to its laws and its taxes.
For Americans specifically, the IRS does not care what you call yourself. U.S. citizens owe federal income tax on worldwide income regardless of where they live or what territory they claim to govern. Using a micronation claim to skip filing is a well-known enforcement trigger.
Space and the Deep Ocean Floor
Beyond Earth’s surface, the ban on national ownership is categorical. Article II of the 1967 Outer Space Treaty states that outer space and celestial bodies are “not subject to national appropriation by claim of sovereignty, by means of use or occupation, or by any other means.”5United Nations Office for Outer Space Affairs. Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, Including the Moon and Other Celestial Bodies No country can own the Moon, Mars, or an asteroid, and the treaty’s prohibition stops governments from authorizing private ownership of celestial real estate either. Novelty “lunar deed” certificates have no legal effect.
There is a narrow carve-out for resources. The U.S. Commercial Space Launch Competitiveness Act, passed in 2015, grants American citizens engaged in commercial space mining the right to possess, own, transport, use, and sell any asteroid or space resources they recover, in accordance with applicable law and the international obligations of the United States.6Office of the Law Revision Counsel. 51 US Code 51303 – Asteroid Resource and Space Resource Rights You might be able to own the minerals you extract; you cannot own the ground you extracted them from. How that interpretation holds up as space mining matures is still an open question.
The seabed under international waters follows a similar pattern. The United Nations Convention on the Law of the Sea calls the deep ocean floor and its resources “the common heritage of mankind,” and Article 137 is direct: no state or private party can claim sovereignty over any part of it, and no such claim will be recognized.7United Nations. UNCLOS Part XI, Section 2 – Legal Status of the Area and Its Resources The International Seabed Authority manages mineral exploration on behalf of humanity as a whole, and seabed minerals can only be sold through its rules.8UN Chronicle. The International Seabed Authority and Deep Seabed Mining
Building an artificial island in international waters does not solve the problem. Under the same convention, artificial islands and structures “do not possess the status of islands,” have no territorial sea of their own, and their presence does not affect any maritime boundary.9United Nations. UNCLOS Part V – Exclusive Economic Zone You get a platform, not a country.
Inside the United States
Within U.S. borders, no land is truly unclaimed. The federal government owns roughly 640 million acres, mostly in western states, and every remaining acre belongs to a state, local government, tribe, or private owner.
The old picture of homesteading a free parcel of federal land is gone. The Homestead Act of 1862 let citizens claim up to 160 acres by living on and improving them for five years, but Congress repealed that framework in 1976 through the Federal Land Policy and Management Act, which declared that remaining public lands should generally stay in federal hands.10Office of the Law Revision Counsel. Federal Land Policy and Management Act – 43 USC Chapter 35 Alaska kept its homesteading provisions for another decade, and those expired in 1986.11Office of the Law Revision Counsel. 43 USC Chapter 7 – Homesteads The Bureau of Land Management can still sell or transfer narrow categories of parcels, but every disposal runs through environmental review, appraisal, and a resource management plan.12Bureau of Land Management. Lands Potentially Available for Disposal Nothing lets a private citizen walk onto federal land and claim it.
Adverse Possession
The one domestic process that resembles claiming unused land is adverse possession, and it applies to neglected private property rather than unowned territory. If someone openly occupies another person’s land without permission, treats it as their own, and keeps doing so for a period set by state law, they can eventually gain legal title. The required time runs from as few as five years in some states to twenty or more in others.
Courts generally require the occupation to be continuous, open and obvious, hostile to the actual owner’s rights, and exclusive. The underlying policy is that land should be used, and an owner who ignores their property for decades while someone else maintains it may lose it. This has nothing to do with terra nullius or sovereignty; it only works against private owners who have truly abandoned oversight of their property, and it is slow, difficult, and heavily litigated.