Dou is the Mandarin pinyin romanization of the Chinese surname written 窦 in simplified Chinese and 竇 in traditional Chinese.

It is romanized Tou in Wade–Giles.

Dou is listed 39th in the Song dynasty classic text Hundred Family Surnames.

[1] As of 2008, it is the 219th most common surname in China, shared by 380,000 people.

[2]