Cicero Peak is a 6,168-foot (1,880 m) mountain in the Black Hills of Custer County, South Dakota.

The mountain is 6 miles (9.7 km) south-southeast of the city of Custer,[1] southwest of Custer State Park, and northwest of Wind Cave National Park.

The closest community is Sanator, which is about 2 miles (3.2 km) northwest of Cicero Peak.

[1] Cicero Peak's fire lookout tower was built in 1939–1940, used for 34 years until 1974, declared surplus, and removed on March 19, 1980.

[2] In 1990, nearby logging equipment sparked and started a large wildfire.