Pitsburg is a village in Monroe Township, Darke County, Ohio, United States. The population was 381 at the 2020 census. Pitsburg was founded under the name of "Arnettsville" in the 19th century, but it languished: an author writing in 1880 described it as "liv only in name and story." The community revived over the next several decades; by 1914, the villag…Pitsburg is a village in Monroe Township, Darke County, Ohio, United States. The population was 381 at the 2020 census. Pitsburg was founded under the name of "Arnettsville" in the 19th century, but it languished: an author writing in 1880 described it as "liv only in name and story." The community revived over the next several decades; by 1914, the village included a school, a Methodist Episcopal church, multiple businesses, and over two hundred residents.