Baengnyeongdo (Korean: 백령도; Korean pronunciation: [pɛŋnjʌŋdo]), sometimes Baekryeong Island, is an island in Ongjin County, Incheon, South Korea. It is an inhabited island located near the Northern Limit Line, and is closer to North Korea than it is to the South.

Since the 1945 division of Korea, the island has remained under South Korean control. This was affirmed by the 1953 Korean Armistice Agreement which ended the Korean War. Since then, the island has hosted both North Korean defectors and skirmishes between the two countries.

The island is now a popular tourist destination, and is known for its scenic cliffs and beaches. It has three Natural Monuments of South Korea.

The island's name means "white wing island".

There is an origin legend surrounding the name. A man and a woman lived in a village in the nearby Hwanghae Province. The two fell in love, but when the woman's father found out about the romance, she was exiled to Baengnyeongdo. Distressed, the man attempted in vain to locate her. One day, the man dreamed that a white crane gave him a piece of paper. The man then awoke to find that he actually did have a paper with the woman's address on it. He then set out to the island, whereupon he found her at the address. The two then lived happily ever after. The island was then dubbed Baekakdo (백학도; lit. 'white crane island'); the name eventually became Baengnyeongdo.

The island is a popular tourist attraction, and has three Natural Monuments of South Korea.

Dumujin Coast [ko] is a quartzite cliff about 50 m (160 ft) tall, off the coast of the island. It was carved by erosion from the waves, wind, and rain. The site has long been considered beautiful and scenic, with a 1612 record describing it as seeming like it was carved by the gods.

The beach at Sagot Cape [ko] is a sandy beach on the island that is 4 km (2.5 miles) long. At low tide, the exposed surface is considered to have such fine-grained sand with sufficient firmness to serve as a natural runway.