The United States technically has the naval power (mainly through the United States Navy) to control or restrict movement there—but:
👉 A full “blockade” would be extremely unlikely because:
It would be seen as an act of war
It would directly affect global oil supply → causing huge economic shock
Many countries (China, India, EU) depend on that route and would strongly oppose it
⚠️ What actually happens in reality?
Instead of blocking it, the U.S. usually:
Patrols the area for security
Escorts oil tankers during tensions
Responds to threats (especially involving Iran)
🔥 Who usually threatens to block it?
More often, it’s Iran that has threatened to close the strait during conflicts or sanctions, not the U.S.
📊 If it were blocked, what would happen?
Oil prices could skyrocket worldwide
Shipping routes would be disrupted
Global markets could crash
Military conflict could escalate quickly
🧠 Bottom line
The U.S. could disrupt traffic in the Strait of Hormuz, but doing so would be extremely risky and unlikely except in a major war scenario. Most discussions about “blocking” it are strategic speculation rather than actual policy.