There are 5,465 think tanks worldwide.

Breakdown:

• 1,872 in North America

• 1,208 in Western Europe
• 653 in Asia
• 538 in Latin America and the Caribbean
• 514 in Eastern Europe
• 424 in sub-Saharan Africa
•  218 in the Middle East and North Africa
•   38 in Oceania

• There are 1,777 think tanks in the United States.
• Nine out of 10 U.S. think tanks were created since 1951.
• The number of U.S. think tanks has more than doubled since 1980.
• Approximately 350 think tanks are based in Washington, more than in any country other than the United States.