|County-level & Sub-prefectural city|
|• Total||2,068 km2 (798 sq mi)|
|Time zone||China Standard (UTC+8)|
Yongcheng is located in the Huai River Basin, in the easternmost part of Henan Province, with an average elevation of 33 meters. The Wei River passes through the northern part of the western urban area and the southern part of the eastern urban area. The Mang Mountain is located in the northern Mangshan Town. The China National Highway 311 runs through the east and west, and the S32 Yongcheng–Dengfeng Expressway runs through the south.