Israel refuses to confirm or deny the widespread belief that it has the nuclear weapon capabilities.
The secrecy with which Israel shrouds its nuclear arsenal renders estimates of its size highly unreliable. Generally, however, it is estimated that Israel has between 100 and 200 nuclear warheads.

Israel developed nuclear weapons with French help in the 1950s and 1960s. Despite refusals to comment on the issue by the Israeli government, the Israelis clearly have a sizeable nuclear arsenal. It is believed that Israel might not keep its nuclear weapons fully assembled - keeping them "a screw away" from completion.

The highly capable and well-equipped Israeli Air Force would more than suffice in the nuclear weapons delivery role, particularly with U.S.-supplied aircraft such as the F-4E and F-16. However, Israel has also produced ballistic missiles. The Jericho I can strike Syria, and the Jericho II brings the entire Middle East under Israel's range, particularly Iran. Israel may also have some tactical nuclear weapons. The Shavit spaclaunch booster could be adapted for a long-range nuclear delivery role, and given the decision, Israel would be able to develop an intercontinental ballistic missile.

The Israeli arsenal will likely remain stable in the years to come. Though Israel signed the Comprehensive Test Ban Treaty, it will likely not reduce or eliminate its nuclear arsenal of 100-200 weapons.

It is possible that Israel possesses an unknown number of tactical nuclear weapons.