Zong is the pinyin romanization of the Chinese surname written 宗. The Wade-Giles transliteration is Tsung.
Zong is also a Cantonese-derived spelling for the surname Zhuang (庄/莊).
According to a 2013 study it was the 217th most common surname, shared by 450,000 people or 0.034% of the population, with Jiangsu being the province with the most people.