Lake Henry is a small artificial lake formed by the construction of a dam across Dawson Creek (South Dakota) in Bon Homme County, South Dakota, United States, about 0.75 mi (1.21 km) east of the town of Scotland.

The lake was named in honor of State Senator Henry Brown of Bon Homme County.

In 1994, the dam was breached and the lake drained to allow spillway repairs and the removal of accumulated sediments.

The renovation project quickly ground to a halt when funding was withdrawn and the lake remained dry for nearly a decade.

Fish species found at Lake Henry include: largemouth bass, yellow perch, channel catfish, black crappie, bluegill, black bullhead, green sunfish, hybrid sunfish, white sucker, and carp.