Kharg Island sits in the northern Persian Gulf like a heavily industrialized oil outpost rather than a traditional island town. Storage tanks stretch across the landscape in tight clusters, pipelines snake toward massive loading jetties, and tanker berths extend into the Gulf where supertankers normally load millions of barrels per day. Roughly ninety percent of Iran’s crude exports pass through this single facility, which is why the island occupies such an outsized role in energy geopolitics. If one imagines global oil supply as a network of arteries, Kharg is not a capillary but one of the main valves. Any threat against it immediately reverberates through shipping insurance markets, tanker routing decisions, and energy futures prices.
From a purely military standpoint, it is technically possible for the United States to seize the island. Amphibious assault forces built around the United States Marine Corps and the United States Navy exist specifically for operations like this. A strike group could isolate the island with air superiority, suppress coastal defenses using cruise missiles launched from ships or submarines, and then land Marine expeditionary forces by helicopter and landing craft. Kharg is relatively small — roughly 8 km long — which means an attacking force could theoretically secure its perimeter quickly once defenses were neutralized. U.S. naval aviation from aircraft carriers combined with long-range bombers such as the B‑52 Stratofortress could dominate the skies, while electronic warfare assets would disrupt Iranian communications and radar.
But capturing territory and holding it are two very different problems.
Iran has spent decades preparing for exactly this type of contingency. The island is believed to host layered defenses run by the Islamic Revolutionary Guard Corps as well as the regular Iranian military. These could include coastal missile batteries, naval mines in surrounding waters, fast attack craft, drones, and anti-ship missiles positioned on the mainland coast only about 30–40 kilometers away. That proximity to the Iranian mainland is the key strategic problem. Even if U.S. forces landed successfully, they would remain under constant missile and drone threat from Iranian territory.
Holding Kharg would therefore require more than just an amphibious landing force. It would likely demand continuous suppression of Iranian launch sites along the Persian Gulf coast. In practice that could escalate quickly into a much larger regional air and naval campaign against Iran’s military infrastructure. Every supply ship, helicopter flight, and logistics convoy heading to the island would be operating within range of Iranian missiles. The U.S. could defend the position with layered missile defenses from ships and Patriot batteries, but the logistics burden would be significant.
Then there is the energy infrastructure itself. Oil terminals, pipelines, and storage tanks are fragile industrial systems. Even small attacks could ignite fires or render loading facilities unusable. Ironically, if Kharg became a battlefield, the facility the U.S. would be trying to control might no longer function as an export terminal at all. A handful of missile strikes on pumping stations or loading arms could shut exports down regardless of who technically held the island.
Politically the consequences would also be enormous. Seizing Iranian territory — even temporarily — would be interpreted by Tehran as an act of war. Iran could retaliate across the region using missile strikes, proxy militias, or attacks on shipping throughout the Persian Gulf. The Strait of Hormuz itself could become unstable, which is precisely the outcome the United States would normally try to prevent because around one-fifth of global oil trade passes through that narrow channel.
For that reason, most military planners view direct occupation of Kharg Island as an extreme option. A far more typical approach in modern naval warfare would be disabling the export facility from a distance rather than trying to capture it. Precision strikes, cyber operations, or naval blockade could achieve similar strategic pressure without committing ground troops to hold territory inside the adversary’s immediate defensive zone.
So yes, the United States has the capability to capture Kharg Island if it chose to commit sufficient forces. But holding it would be difficult, costly, and potentially escalatory on a regional scale. In strategic terms it would likely trigger a wider Gulf conflict rather than resolve the underlying crisis around the Strait of Hormuz.