Xinxi may refer to:
Populated places Xinxi, Yushui (), a township in Yushui District, Xinyu, Jiangxi Xinxi, Longhu (), a town in Longhu District, Shantou, Guangdong Xinxi County (), an administrative division of the ancient Runan Commandery (present-day Henan and Anhui provinces) Xinxi Village (), Daba, Puning, Guangdong Xinxi Village (), Suoshi, Shuangfeng, Hunan Xinxi Village (), Yanglin, Shaoshan, Hunan Xinxi Village (), Anle District, Keelung, Taiwan Xinxi Village (), West District, Chiayi, Taiwan
Other Xinxi (), a minor character in the wuxia novel The Deer and the Cauldron by Jin Yong