Petersburg is a rural unincorporated community and census-designated place (CDP) in Boone County, Kentucky, United States.

As of the 2020 census Petersburg, along with its surrounding areas that use the 41080 zip code, had a population of 500.

Archaeological evidence reveals an ancient Indian settlement was located at Petersburg town site.

[3] The Bullittsburg Baptist Church was founded outside the former hamlets of Utzinger and Gainesville/Idewild, east and north of Petersburg, in 1794.

This Boone County, Kentucky state location article is a stub.