Harb (Arabic: حرب) is an Arabic surname that may refer to the following people:

• Abu Sufyan ibn Harb (560–650), son of the 7th century Arabian Meccan leader Harb ibn Umayya, and leader of the Quraysh of Mecca
• Ahmad ibn Harb (died 234), Iranian Sufi, traditionist and a fighter in the holy wars
• Benjamín Miguel Harb (1926–2008), Bolivian politician and lawyer
• Boutros Harb (born 1944), Lebanese politician
• Chucrallah Harb (1923–2019), Lebanese Hierarch of Maronite Church
• Fred Harb (1930–2016), American stock car racing driver
• Harith ibn Harb, son of the 7th century Arabian Meccan leader Harb ibn Umayya, brother of Abu Sufyan ibn Harb
• Helen Hicks Harb (1911–1974), American golfer
• Janan Harb (born 1947), wife of King Fahd of Saudi Arabia
• Joseph Harb (1940–2014), Lebanese poet and writer
• Mac Harb (born 1953), Canadian parliamentarian
• Mehdi Harb (born 1979), Tunisian football player
• Nabil Abou-Harb (born 1984), Arab-American filmmaker, writer, producer, and director
• Ragheb Harb (1952–1984), Lebanese resistance leader and Muslim cleric
• Ramez Harb (died 2012), Palestinian militant
• Talaat Harb (1867–1941), Egyptian economist
• Tanios Harb (born 1925), Lebanese sports shooter
• Wahshi ibn Harb, companion of the Islamic prophet Muhammad
• Zaid Al-Harb (1887–1972), Kuwaiti poet