Arro is an Estonian surname, meaning "stone hill". Notable people with the surname include:
Edgar Arro (1911–1978), Estonian composer Elmar Arro (1899–1985), Estonian music historian Christian Arro (1885–1942), Estonian agriculturist and politician Jaak Arro (born 1957), Estonian stage artist and painter Lembit Arro (1930–2022), Estonian politician Kalev Arro (1915–1974), Estonian partisan Mikk-Mihkel Arro (born 1984), Estonian decathlete
See also
Gemma Arró (born 1980), Catalan ski mountaineer Aaro