Boscobel is a city in Grant County, Wisconsin, United States. The population was 3,286 at the 2020 census. Approximately 0.6 mi. (1 km) to the north of the city, across a riparian swamp, is the Wisconsin River. U.S. Route 61 crosses the Wisconsin River at Boscobel. To the south, the city is bordered by the Town of Boscobel.