The U.S. nuclear program is comprised of a complex network of facilities and weaponry, and of course the actual warheads themselves. Let's look at the location of warheads, how they're deployed, and the costs associated with running and refurbishing an aging nuclear program.
Let's launch into the data.
Nuclear Weapons Map
As of 2019, the U.S. Department of Defense maintained an estimated stockpile of 3,800 nuclear warheads for delivery by more than 800 ballistic missiles and aircraft. Roughly 1,300 warheads are actually deployed, while most of the remaining inventory is either held in reserve (as a hedge against "technical or geopolitical surprises") or is destined to be dismantled.
These weapons are thought to be stored across 11 U.S. states, with the vast majority residing in New Mexico, Washington, and Georgia.