Petersburg is an unincorporated community located within Upper Township in Cape May County, in the U.S. state of New Jersey.

[2] A post office was established in 1856, with Peter Corson as the first postmaster.

Cape May County Library operates the Upper Township Branch in Petersburg.

[4] People who were born in, residents of, or otherwise closely associated with Petersburg include:

This Cape May County, New Jersey state location article is a stub.