Spain produces more olive oil than any other country in the world. Spain in comprised of two major olive producing regions: Catalonia and Andalusia. Andalusia produces the most olive oil…it is comprised of 8 counties, one of them named Jaen. To give you an idea of just how much oil Spain produces, Jaen county alone produces more olive oil than the entire country of Greece, the #3 producer! There are over 165 million trees in Andalusia alone, and over 350 different varieties of olives.