Leiyang is a county-level city and the third most populous county-level division in Hunan Province, China. Leiyang is under the administration of the prefecture-level city of Hengyang. Located on the south of the province, the city is bordered to the north by Hengnan County, to the west by Changning City, to the south by Guiyang and Yongxing counties, to the east by Anren County. Leiyang City covers 2,656 km2 (1,025 sq mi) with registered population of 1,413,913 and resident population of 1,150,241. The city has six subdistricts, 19 towns and five townships under its jurisdiction, the government seat is Caizichi Subdistrict.

Hengyang is the second largest city of Hunan Province, China. It straddles the Xiang River about 160 km (99 mi) south of the provincial capital of Changsha. As of the 2020 Chinese census, Its total population was 6,645,243 inhabitants, whom 1,290,715 lived in the built-up area consisting of 4 urban districts, Nanyue District not being conurbated yet.