Currently, nine countries possess nuclear weapons. Below is a list of the estimated number of nuclear warheads in each country as of May 2021 (according to the Federation of American Scientists).

• Russia: 6,257 nuclear warheads

• US: 5,550 nuclear warheads

• China: 350 nuclear warheads

• France: 290 nuclear warheads

• UK: 225 nuclear warheads

• Pakistan: 165 nuclear warheads

• India: 160 nuclear warheads

• Israel: 90 nuclear warheads

• North Korea: Estimated 30-40 nuclear warheads with sufficient fissile materials for 45 nuclear warheads ("The[ir] number of assembled warheads is unknown, but lower.")