Quercus mongolica, commonly known as Mongolian oak, is a species of oak native to Japan, China, Korea, Mongolia, and Siberia. The species can grow to be 30 metres (98 feet) tall.

The flavono-ellagitannins mongolicin A and B can be found in Quercus mongolica var. grosseserrata.

Extrafloral nectaries have been reported on the leaf buds of this species.

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