Qidong County is a county and the 8th most populous county-level division in the Province of Hunan, China; it is under the administration of Hengyang prefecture-level city. The county was formed from the eastern part of Qiyang County in April 1952 and was named after the east of Qiyang. Qidong County covers 1,872 km², as of 2015, it had a registered pop…Qidong County is a county and the 8th most populous county-level division in the Province of Hunan, China; it is under the administration of Hengyang prefecture-level city. The county was formed from the eastern part of Qiyang County in April 1952 and was named after the east of Qiyang. Qidong County covers 1,872 km², as of 2015, it had a registered population of 1,067,000. The county has four subdistricts, 17 towns and three townships under its jurisdiction, the county seat is Hongqiao Subdistrict.