Xincheng may refer to:

• Tuoba Xincheng (拓拔新成), brother of Emperor Wencheng of Northern Wei; held the title of Prince You of Yangping
• Xincheng, one of the daughters of Emperor Taizong of Tang (Li Shimin) and Empress Zhangsun

• Xincheng County (忻城县), in Laibin, Guangxi
• Xincheng District (新城区)
  • Xincheng District, Hohhot, Inner Mongolia
  • Xincheng District, Xi'an, Shaanxi
• Xincheng Air Base and Yinchuan/Xincheng Air Base, both in the Lanzhou Military Region of the PRC
• Xincheng, one of the nine commanderies of the Protectorate General to Pacify the East
• Xincheng Prison in Beijing
• Xincheng Town (disambiguation)
• Xincheng Township (disambiguation) (新城乡)
• Xincheng Subdistrict (disambiguation)

• Xincheng, Hualien (新城鄉), township in Hualien City, Republic of China (Taiwan)
  • Xincheng Incident, during the Japanese occupation

• Xincheng Opera, a traditional form of Chinese theater from northeast China

• Xingcheng, a county-level city in Huludao, Liaoning province, China