Who has the largest oil reserves?

According to the U.S. Energy Information Administration, the countries of the Middle East have the largest oil reserves, totaling over 739,000,000,000 barrels. This is more than half of the known reserves in the world of 1,317,447,000,000 barrels.

The United States has roughly seven times the known reserves of oil then all of the Middle East. The Green Valley reserve has 4 trillion to 7 trillion barrels in it. The Baikan Reserve also has about 2 trillion barrels located inside of it. Neither of these reserves are currently used.

The Middle East has the largest portion of tapped and pumping reserves in the world.