Roh is a given name or surname that is found in many different cultures.

Roh, sometimes spelled Noh, Ro or Lho, is a given name of Sanskrit origins, derived from the male given name Rohit, meaning "rising sun", or "red horizon".

Roh is also a Gaelic boy name, with roots from the Irish word 'rough'. It was a popular given name in the early Dark Ages, alluding to the fighting and rebellious nature of the Irish people.

Roh also has Germanic roots as a given name and surname, the meaning of which vary from 'rough soldier' to 'curious knight'. Notable examples include:

• Franz Roh (1890–1965), German historian, photographer, and art critic
• Peter Roh (1811–1872), Swiss Jesuit preacher

Roh (노), officially transliterated as No, Ro or Lho is also a surname of Korean and other origins. The Korean Roh (also romanized Noh) derives from the Chinese surname Lu (surname 盧) or Lu (surname 魯). Notable people with the family name include:

• Lho Shin-yong (1930–2019), South Korean politician
• No Byung-jun (born 1979), South Korean former professional football player
• No Min-woo (born 1986), Japanese-born South Korean actor and singer
• Noh Ah-reum (born 1991), South Korean short track speed skater
• Noh Cheonmyeong (1912–1957), South Korean poet
• Noh Do-hee (born 1995), South Korean short track speed skater
• Noh Do Young (born 1963), South Korean physicist
• Noh Haeng-ha (born 1990), South Korean actress
• Noh Hee-kyung (born 1966), South Korean television screenwriter and essayist
• Noh Hong-chul (born 1979), South Korean entertainer and entrepreneur
• Noh Hyeong-ouk (born 1962), South Korean activist and government official
• Noh In-kyung (born 1980), South Korean author and illustrator
• Noh Jong-hyun (born 1993), South Korean actor
• Noh Kyung-eun (born 1984), South Korean professional baseball player
• Noh Sa-yeon (born 1957), South Korean singer and television personality
• Noh Sang-hyun (born 1990), Korean-American actor and model
• Noh Seung-yul (born 1991), South Korean professional golfer
• Noh Tae-won (born 1957), South Korean physicist
• Noh Woo-jin (born 1980), South Korean comedian
• Noh Woong-rae (born 1957), South Korean politician
• Noh Young-hak (born 1993), South Korean actor
• Roh Deok (born 1980), South Korean film director and screenwriter
• Roh Gyeong-tae (born 1972), South Korean film producer, director and screenwriter
• Noh Haeng-ha (or Roh Haeng-ha]] (born 1990), South Korean actress
• Roh Jeong-eui (born 2001), South Korean actress
• Roh Ji-hoon (born 1990), South Korean singer and dancer
• Roh Hoe-chan (1956–2018), South Korean politician
• Roh Moo-hyun (1946–2009), South Korean politician and lawyer
• Roh Sang-rae (born 1970), South Korean retired football player
• Roh Soh-yeong (born 1961), South Korean business executive
• Roh Tae-hyun (born 1993), South Korean singer and dancer
• Roh Tae-woo (1932–2021), South Korean politician and army general
• Roh Yoon-seo (born 2000), South Korean actress and model

Roh is a Japanese reading of the Kanji 朗 used in names. Examples include:

• Roh Ogura (1916–1990), Japanese composer and writer