Hazleton was incorporated as a borough on January 5, 1857. “Hazelton” was intended to be the borough's name, but a clerk misspelled it during its incorporation, and the name "Hazleton" has been used ever since. The borough's first fire company, the Pioneer Fire Company, was organized in 1867 by soldiers returning home from the American Civil War. Hazleton was incorporated as a city on December 4, 1891. At the time, the population was estimated to be around 14,000 people. In 1891, Hazleton became the third city in the United States to establish a citywide electric grid.