Brown's Lake Bog

Brown's Lake Bog is a dedicated Ohio state nature preserve owned by The Nature Conservancy. It is one of the few remaining kettle peatlands in the U.S. state of Ohio. It has a kettle lake, kame, and a floating sphagnum moss mat. Public visitation is allowed.

It is located in southwestern Wayne County near the village of Shreve. It was designated a National Natural Landmark in 1967.