Ansonia is a village in Darke County, Ohio, United States. The population was 1,160 at the 2020 census. Ansonia was founded in 1845 under the name of "Dallas." The village initially grew slowly; significant expansion only came after the coming of a railroad in 1852. Because dense swamps hindered settlement in the vicinity, woodland was plentiful, and Anso…Ansonia is a village in Darke County, Ohio, United States. The population was 1,160 at the 2020 census. Ansonia was founded in 1845 under the name of "Dallas." The village initially grew slowly; significant expansion only came after the coming of a railroad in 1852. Because dense swamps hindered settlement in the vicinity, woodland was plentiful, and Ansonia became a center of manufacturing for hardwood products. In 1873, the residents replaced their old school with a substantial two-story building at the cost of ten thousand dollars; this building was the first home of Ansonia High School, which was founded in that year. In turn, this building was demolished and a replacement erected in 1903. Another prominent structure in the village was a mausoleum; built of marble in 1911, it was the first mausoleum in Darke County.