Aru

• Alpha Rho Upsilon, a defunct fraternity in the United States • Anglia Ruskin University, a university in England • Ardhi University, a Tanzanian public university ==Places==

• Aru Islands Regency, a group of islands and the regency in the Moluccas • Aru, Democratic Republic of Congo, a town in Ituri province • Aru, Harju County, village in Kuusalu Parish, Harju County, Estonia • Aru, Saare County, village in Saaremaa Parish, Saare County, Estonia • Aru, Kohgiluyeh and Boyer-Ahmad, village in Gachsaran County, Kohgiluyeh and Boyer-Ahmad Province, Iran • Aru, Basht, village in Basht County, Kohgiluyeh and Boyer-Ahmad Province, Iran • Aru, Damavand, village in Damavand County, Tehran Province, Iran • Aru, Firuzkuh, village in Firuzkuh County, Tehran Province, Iran • Aru, Jammu and Kashmir, village in India • Aruba, IOC and UNDP country code ARU ==Sports==

• Fabio Aru, Italian cyclist • Army Rugby Union, organizational body for rugby union in the British Army • Australian Rugby Union, former name of Rugby Australia, governing body for rugby union in Australia ==Technology==

• Automated response unit, a telecommunications device • Autonomous Recording Unit, an audio recording device ==People==

• Ines Aru (born 1939), Estonian actress • Krista Aru (1958–2025), Estonian historian, museologist and politician • Peep Aru (born 1953), Estonian politician • Aru Tateno (born 1997), Japanese ice dancer • Aru Krishansh Verma (born 1986), Indian actor ==Other uses==

• American Railway Union, an industrial union in the United States • Aquarium Rescue Unit, an American jazz-rock band • Araçatuba Airport, IATA airport code • Arundel railway station, a railway station in England (National Rail code ARU) • Aru language (disambiguation) • Aru Kingdom, an early Islamic polity in northeast Sumatra between the 13th and 16th centuries