Worldwide deployments of nuclear weapons, 2017

Nuclear Notebook: How many nuclear weapons are there in the world?

As of mid-2017, we estimate that there are nearly 15,000 nuclear weapons located at some 107 sites in 14 countries. Roughly, 9400 of these weapons are in military arsenals; the remaining weapons are retired and awaiting dismantlement. Approximately 4150 are operationally available, and some 1800 are on high alert and ready for use on short notice.

By far, the largest concentrations of nuclear weapons reside in Russia and the United States, which possess 93 percent of the total global inventory (Kristensen and Norris 2013). In addition to the seven other countries with nuclear weapon stockpiles (Britain, France, China, Israel, India, Pakistan, and North Korea), five nonnuclear NATO allies (Belgium, Germany, Italy, the Netherlands, and Turkey) host about 150 US nuclear bombs at six air bases…

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The Nuclear Notebook is researched and written by Hans M. Kristensen, director of the Nuclear Information Project with the Federation of American Scientists and Robert S. Norris, a senior fellow with the FAS. The Nuclear Notebook column has been published in the Bulletin of the Atomic Scientists since 1987. The Nuclear Notebook column has been published in the Bulletin of the Atomic Scientists since 1987.