Hwangsanok (Korean: 황산옥) is a historic seafood restaurant in Nonsan, South Chungcheong Province, South Korea. It is among the oldest active restaurants in South Korea, having been founded in 1915. It has remained a family business, and by 2019 was on its third generation of owners.

The restaurant was founded by Han Man-rye (한만례). It began as a small restaurant for people waiting for a ferry. The restaurant owner served maeun-tang from Amur catfish (메기; maegi) caught in the nearby river. In 1955, the restaurant was passed onto the second generation. In 1987, South Korean president Chun Doo-hwan reportedly ate at the restaurant. The restaurant offers several dishes that use pufferfish.