Ever wonder where all of our nuts come from, especially considering that they are easily found in just about every market you could wander into?

• Cashews are grown throughout the tropics, but most come from are India and East Africa. They are never sold in the shell because there is an extremely caustic oil between the inner and outer layers which must be burned off before they can be sold.
• Almonds originated in the Mediterranean, but California now produces 80% of the world's supply.
• Macadamia nuts are native to Australia and were brought to Hawaii about 100 years ago. Commercial production began around 1920 and most of the world's macadamias are now grown on Hawaii.
• Walnuts are the third most popular nut in the US and California produces 2/3 of the world's crop.
• Pecans are native to the Mississippi valley and are the only nut native to the US. Georgia is the largest producer of pecans.
• Hazelnuts, also known as filbert, are primarily grown in Turkey, where 75% of the world's supply comes from. Almost all the US grown hazelnuts are from Oregon's Willamette valley
• Pistachio production is the largest in Iran, which accounts for about 40% of the international crop. The US is the second largest producer, with almost 30% of the crop, 98% of which is grown in California.
• Peanuts are not really nuts, but are legumes and members of the pea family (only included here as they most often grouped with nuts). China is the largest producer, with almost 40% of the world crop. India has almost 25%and the U.S., the third largest producing country, has only 6%. Roughly 2/3 of the global peanut crops are processed into peanut oil.
• Brazil nuts are resistant to cultivation and are still primarily harvested from the wild in South America.

[sources, source]