5 Countries with Most Nuclear Weapons in the World

In this article, we are going to look at 5 countries with most nuclear weapons in the world. If you want to read more about the countries with most nuclear weapons in the world and check out our detailed analysis of the global defense industry, you can go to 10 Countries with Most Nuclear Weapons in the World.

5. United Kingdom

Nuclear Warheads: 225

The United Kingdom started a nuclear weapons program during World War II, and in 1952, it became the third nuclear weapons state in the world. With an estimated 225 nuclear warheads, the UK ranks among the top 5 countries with most nuclear weapons in the world. However, only 120 of the total nuclear warheads are deployed with operational forces. The UK is also one of the four nations that have nuclear warheads on high alert, ready to be used on short notice. The other nations are Russia, France, and the US, all of which have more nuclear warheads than the UK.