Oto, Ōtō, or OTO may refer to:
People Oto (name), including a list of people with the name The Otoe tribe (also spelled Oto), a Native American people
Places Oto, Spain, a village in the Valle de Broto, in Huesca, Aragon
Japan Ōtō, Fukuoka Ōtō, Nara, merged into Gojō in 2005 Ōtō, Wakayama, merged into Tanabe in 2005
United States Oto, Iowa Oto, Missouri Oto Reservation, formerly located in southeastern Nebraska OTO Homestead and Dude Ranch, Montana
Other uses Greta oto, a butterfly of family Nymphalidae Ordo Templi Orientis, organization centered on the Law of Thelema Oto (album), the third album by Fluke, released in 1995 OTO Awards, a Slovak awards show Otocinclus, a genus of armored catfish Zebra oto Oto-Manguean languages, a large family comprising several families of Native American languages Oto-Pamean languages Oto Melara, an Italian defense company, formerly known as Odero Terni Orlando OTO (Slovenian TV channel), part of media company Pro Plus Seibi Oto, a fictional character in the anime series Sky Girls Osu! Tatakae! Ouendan!, a 2005 rhythm video game
See also Aloadae, Greek mythological figures also known as Otos Otoe (disambiguation) Otology, a branch of medicine which studies the ear Otos, Valencia, Spain