Haian (disambiguation)
Hai'an () is a county-level city in Jiangsu, China.

Haian or Hai'an may also refer to:

 Hai'an Range (), on the eastern shore of Taiwan 
 Hai'an Subdistrict (), Jinping District, Shantou, Guangdong
 Hai'an, Chenjiagang, Xiangshui, Yancheng, Jiangsu
 Chinese frigate Hai-an