Zhou Hongyi is a Chinese businessman with an estimated net worth of $1.64 billion as of April 2016 according to Forbes. He is known to be the former CEO of Yahoo! China, a position he served from January 2004 through August 2005. Prior to his tenure with Yahoo!, he co-founded the 3721.com which was later acquired by Yahoo!.  He served as 3721.com's CEO and Chairman until January 2004 when it was acquired by Yahoo!.

Most of his fortune is acquired through the Qihoo, an Internet security and search company that is based in Beijing. Since 2006, Hongyi served as the company's Chairman, CEO, and Director.

Zhou Hongyi is an alumnus of Xian Jiaotong University.