Petersburg is an unincorporated community in Henry County, in the U.S. state of Missouri.
[1] Petersburg was originally called Carrsville, and under the latter name was founded in the 1870s, taking its name from Carrsville Mill.
[2] A post office called Carrsville was established in 1872, the name was changed to Petersburgh in 1881, and the post office closed in 1902.
[3] The present name honors Peter Lane, a local merchant.
This Henry County, Missouri state location article is a stub.