Ito, Itō or Itoh may refer to:

• Ito Island, an island of Milne Bay Province, Papua New Guinea
• Ito Airport, an airport in the Democratic Republic of the Congo
• Ito District, Wakayama, a district located in Wakayama Prefecture, Japan
• Itō, Shizuoka

• Itō (surname), for people with the Japanese surname Itō
• Hiroshi Ito (糸 博, born 1933), Japanese voice actor
• Kiyosi Itô (1915–2008), Japanese mathematician
• Princess Ito (died 861), Japanese imperial princess
• Ito Giani (1941–2018), Italian sprinter
• Ito (footballer, born 1961), full name Andrés Alonso García, Spanish footballer
• Ito (footballer, born 1975), full name Antonio Álvarez Pérez, Spanish footballer
• Ito (footballer, born 1992), full name Jorge Delgado Fidalgo, Spanish footballer
• Ito (footballer, born 1994), full name Mario Manuel de Oliveira, Angolan footballer
• Ito Ohno (大野 いと, born 1995), Japanese fashion model and actress
• Ito Smith (born 1995), American football player
• Ito Curata (1959–2020), Filipino fashion designer
• Ito Morabito (born 1977), French designer
• Ito Ogawa (born 1973), Japanese novelist, lyricist, and translator

• Ito language, an Ibibio-Efik language of eastern Nigeria
• Itoh peony, a hybrid plant in genus Paeonia
• Indium tin oxide (ITO), a transparent thin film conductor
• I_to1, an abbreviation of cardiac transient outward potassium current
• Ito: A Diary of an Urban Priest, a 2010 documentary film by Pirjo Honkasalo

• Ito cell, a fat-storing cell found in the liver; also called a hepatic stellate cell
• Ito-toren, an office building in Amsterdam
• Itô calculus
• Itô's lemma, used in stochastic calculus
• Itoh–Tsujii inversion algorithm, in field theory
• in Spanish, diminitives are formed by appending -ito to masculine words
• ITO (disambiguation)