Nuclear weapons of North Korea

North Korea has assembled an estimated 60 warheads and holds fissile material for perhaps 30 more, produced at Yongbyon and at least one other enrichment site. It withdrew from the NPT in 2003 — the only state ever to do so — and has conducted six nuclear tests between 2006 and 2017, the last a claimed thermonuclear device. Its 2023 constitutional amendment enshrines the nuclear arsenal as permanent, and official doctrine allows first use.

Delivery development has been rapid: the liquid-fueled Hwasong-15 and Hwasong-17 and the solid-fueled Hwasong-18 and Hwasong-19 give intercontinental reach on paper, though a proven reentry capability remains debated. Shorter-range systems — KN-23-class missiles, the Hwasan-31 tactical warhead, cruise missiles — point to battlefield use, and a submarine-launched component is under development at Sinpo.

Pyongyang rejects denuclearization talks, and its deepening military alignment with Russia since 2024 has raised concerns about technology transfer. Estimates of its arsenal carry wider uncertainty than for any other nuclear-armed state.

The program keeps compounding: the Hwasong-19 solid-fuel ICBM flew in late 2024, an even larger system was paraded in 2025, and a previously undisclosed uranium-enrichment site was shown publicly in 2024. The mutual-defense treaty signed with Russia in 2024 raised technology-transfer concerns in both directions. Pyongyang's stated course — exponential warhead growth and tactical weapons for battlefield units — continues without any negotiating track.

Washington's own public figures move and are never sourced: Donald Trump told reporters at the White House on 19 August 2026 that Kim Jong Un "has 57 very powerful nuclear weapons", four months after putting the count at 45, without saying what either number rested on or whether it meant assembled warheads, deployed weapons or fissile material held. Both sit below Seoul's working range — the South Korean defense minister told lawmakers in August 2026 that the government generally uses 80 to 120 — and well below the 127 to 150 a Korea Institute for Defense Analyses researcher derived from estimated plutonium and enriched-uranium output. That spread, from 45 to 150, is the honest measure of the uncertainty. The 60 used here follows the Federation of American Scientists, and the remark itself came days after Trump ordered joint exercises with South Korea scaled back, alongside his statement that he expects to meet Kim later in the year.