Do is a surname of multiple origins.

• Do or Doh (Korean: 도; Hanja: 陶, 都, or 道; MR: To), the romanization of the Korean surname
  • According to the 2000 South Korean census, there were 54,779 people in 16,952 households with the surname spelled Do in Revised Romanization of Korean.^[1] In a study based on a sample of applications for South Korean passports in 2007, 86.9% chose to spell it as Do, 9.7% as Doh, and 1.1% as Toh.^[2]
• Đỗ or Do, a Vietnamese surname
• Do, Italian surname, from the Lombard name of Ono San Pietro ^{[citation needed]}

• Do Dong-hyun (born 1993), South Korean professional footballer
• Do Eun-chul (born 1963), South Korean former cyclist
• Do Hwa-sung (born 1980), South Korean footballer
• Do Ji-han (born 1991), South Korean actor
• Do Ji-won (born 1966), South Korean actress
• Do Jong-hwan (born 1955), South Korean poet and politician, former Minister of Culture, Sports and Tourism
• Do Kum-bong (1930–2009), South Korean actress
• Do Kyung-soo (born 1993), South Korean singer and actor, member of boy band EXO
• Do Han-se (born 1997), South Korean rapper and singer, member of boy band Victon
• Do Sang-woo (born 1987), South Korean actor and model
• Do Sunwoo (born 1971), South Korean writer

• Anh Do (born 1977), Vietnamese-Australian author, actor, comedian, painter
• Do Anh Vu (1113–1158), official in the royal court of Lý Anh Tông, the sixth emperor of the Lý Dynasty
• Do Cao Tri (1929–1971), general in the Army of the Republic of Vietnam
• Cong Thanh Do (born 1959), Vietnamese American human rights activist
• Do Hoang Diem (born 1963), former chairman of the pro-democracy party Việt Tân
• Khoa Do (born 1979), Vietnamese-Australian film director, screenwriter, philanthropist
• Mattie Do (born 1981), Laotian American film director
• Do Mau (1917–2002), South Vietnamese military officer and politician
• Michelle Do (born 1983), Vietnamese-American table tennis player
• Minh Quan Do (born 1984), Vietnamese retired tennis player
• Do Muoi (1917–2018), Vietnamese communist politician
• Do Nhuan (1922–1991), Vietnamese classical composer
• Quinn Do (born 1975), American professional poker player
• Do Thanh Nhon (died 1781), Vietnamese 18th-century military commander
• Do Thi Ha (born 2001), Vietnamese model, beauty pageant titleholder, Miss Vietnam 2020
• Do Thi Hai Yen (born 1982), Vietnamese actress
• Do Thi Minh (born 1988), Vietnamese retired volleyball player
• Thi Ngan Thuong Do (born 1989), Vietnamese artistic gymnast
• Tristan Do (born 1993), Thai professional footballer
• Yen Ngoc Do (1941–2006), Vietnamese American newspaper publisher, founder of Nguoi Viet Daily News

• Giovanni Do (c. 1617–c. 1656), Spanish painter