51
29.2%
The only victim of nuclear bombs, Japan could produce a bomb within a year if it tried - but is under US umbrella.
23
32.2%
The US stored weapons in South Korea until 1991.
17
15.1%
Has not had permanently stationed US nuclear weapons since 1984.
15
48.1%
Inherited 5,000 warheads from the Soviet Union but transferred them to Russia by 1996.
10
38.1%
8
20.1%
6
33.2%
The Soviet Union is suspected to have stored clandestine nuclear weapons in Czechoslovakia during the Cold War.
5
38.0%
4
28.4%
4
42.1%
Acknowledged after Cold War that had hosted Soviet nuclear weapons.
4
51.8%
The Soviet Union is suspected to have stored clandestine nuclear weapons in Czechoslovakia during the Cold War.
2
5.9%
2
3.1%
2
33.1%
2
3.6%
2
19.5%
2
5.2%
Produced six nuclear weapons in the 1980's but destroyed them in the early 1990's.
1
39.4%
1
0%
Suspected by some Western countries to be seeking nuclear weapons.
1
37.3%
104
19.6%
8500
In addition to 5,000 warheads in stockpile, some 3,500 are awaiting dismantlement.
58
74.1%
300
Conducted its first nuclear test "Gerboise Bleue" in the Algerian Sahara desert in 1960.
33
17.1%
10000
Has most warheads of any nuclear power despite large-scale dismantling programme.
20
2.9%
90
First tested nuclear device during "Smiling Buddha" explosion in 1974.
17
15.7%
225
Tested first device, close copy of bombed used on Nagasaki, in 1952 at a lagoon in Western Australia.
15
1.8%
240
Conducted its first nuclear test code-named "596" at the Lop Nur site in 1964.
9
28.4%
20
Used to be the most heavily nuclearised "non-nuclear" NATO power but now only stored at Buchel Air Base.
7
51.2%
20
Under NATO nuclear weapons-sharing agreements, the US has provided weapons to be stored and deployed at Kleine Brogel AB.
3
2.6%
100
Became world's seventh nuclear power with Chagai-1 underground atomic testing of five devices in 1998.
1
3.4%
20
Stores and handles US nuclear weapons at Volkel Air Base.
200
Jane's Defence Weekly has estimated Israel's arsenal at several hundred.
40
Local troops host US nuclear weapons at Ghedi Torre Air Base and US troops handle them at Aviano AB.
5
Having withdrawn from the NPT in 2003, Pyongyang conducted tests in 2006 and 2009, the latter of which was more succesful.
90
Incirlik is the only remaining storage site for US nuclear weapons in Turkey, after bombs were removed from the others.
Countries to the left with nuclear power but no weapons are listed in order of the total number of current operable civilian reactors connected to the grid to generate electricity.
In the centre and to the right, hover to see countries' nuclear status and the total military inventory of weapons that are considered operational (strategic and nonstrategic), reserve and stockpile.
In addition to the nine countries that have their own nuclear weapons, shaded American flags indicate the five countries hosting US nuclear warheads under NATO sharing agreements.