Centralia is a borough and near-ghost town in Columbia County, Pennsylvania, United States. Its population has declined from 1,000 in 1980 to 5 residents in 2017 because a coal mine fire has been burning beneath the borough since 1962. Centralia, part of the Bloomsburg–Berwick metropolitan area, is the least-populated municipality in Pennsylvania. Centralia is also a highly visited tourist attraction with thousands of visitors annually.

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