Centralia is a borough and ghost town in Columbia County, Pennsylvania, United States. Its population has dwindled from over 1,000 residents in 1981 to 12 in 2005, as a result of a mine fire burning beneath the borough since 1962. Centralia is one of the least-populated municipalities in Pennsylvania.
Centralia is part of the Bloomsburg-Berwick micropolitan area. The borough is completely surrounded by Conyngham Township.
All properties in the borough were claimed under eminent domain by the Commonwealth of Pennsylvania in 1992 (and all buildings therein were condemned), and Centralia's ZIP code was revoked by the Postal Service in 2002. A few residents continue to reside there in spite of the failure of a lawsuit to reverse the eminent domain claim.