China has been the clear leader in garlic production in the world over the last few decades.

An excerpt from the article 20 facts about garlic

The main production center is in Shandong Province. China produces over 75% of the world's garlic (23.305.888 tons per year). India ranks second with an annual production of 2.910.000 tons. Worldwide, 30.708.243 tons of garlic are produced annually.