| Brown's Lake Bog Preserve | |
| Map: | USA Ohio#USA |
| Location: | Wayne County, Ohio |
| Nearest City: | Shreve |
| Coordinates: | 40.6809°N -82.0624°W |
| Established: | 1966 |
| Governing Body: | Nature Conservancy |
| Url: | Official website |
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.[1]