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In fact, the U.S outspends Russia, the next highest spender, by more than 800 percent.
In 2008, the most recent year for which figures are available, the U.S. expenditure was $696.3 billion, followed by Russia's $86 billion and China's $83.5 billion.
The U.S. defense budget is 15 times that of Japan, 47 times that of Israel, and nearly 73 times that of Iran.
Not only does U.S. spending dwarf that of other nations, but it has also grown in recent years.
The budget for fiscal year 2011 is $720 billion, up 67 percent from 2001's $432 billion, accounting for inflation.
The U.S. Navy can carry twice as many aircrafts at sea as the rest of the world put together, he said, and the navy's overall power is estimated to exceed that of the next 13 most powerful navies combined.
This extreme dominance exists in all branches of the armed forces.
It is notable in the Center for Arms Control and Non-Proliferation's report that, while China and Russia are big spenders, defense spending comes overwhelmingly from the Western industrialized world.
The United States itself accounts for 44.32 percent of the global total spending of $1.57 trillion, with the rest of NATO and non-NATO Europe accounting for another 22.43 percent.
The Middle East and North Africa, on the other hand, account for 7.03 percent, Latin America and the Caribbean for 3.69 percent, and Sub-Saharan Africa a mere 0.77 percent.
China and Russia account for 5.31 percent and 5.47 percent, respectively.
A study released in April by the Stockholm International Peace Research Institute showed that Western industrialized countries strongly dominate arms manufacture, as well.
British Aerospace Systems is the largest arms manufacturer in the world, followed by four U.S.-based contractors.
Of the world's top-20 manufacturers, only one, Russia's Almaz-Antei, comes from a non-Western nation.
The Stockholm International Peace Research Institute Susan Jackson told IPS that companies in Western countries have a competitive advantage because of the higher level of technology available to them.
One non-Western country is missing from the Center for Arms Control and Non-Proliferation's report: North Korea, which does not make reliable figures publicly available.
While Middle Eastern countries account for a small percentage of worldwide defense spending, Gulf Cooperation Council countries—Bahrain, Qatar, United Arab Emirates, Kuwait, Oman, and especially Saudi Arabia—have ramped up spending in recent years as fears grow about Iranian nuclear weapons development.
These fears are a major factor in Israel's high defense spending as well, Stockholm International Peace Research Institute's Pieter Wezeman told IPS.
Defense spending remains high worldwide despite the global economic crisis. There is reason to believe that the recession's effects may halt this growth, however.
The U.S. Congressional Budget Office has warned that increased debt will have to mean decreased spending across the board, with defense spending no exception. Thus far, however, as the new report shows, the economic crisis has not dampened outsized U.S. spending.