on

On, on, or ON may refer to:

Arts and entertainment

Ön, a 1966 Swedish film
On (Japanese prosody), the counting of sound units in Japanese poetry
On (novel), by Adam Roberts
ONdigital, a failed British digital television service, later called ITV Digital
Overmyer Network, a former US television network

On, Egyptian name of Heliopolis
On (biblical figure), son of Peleth
On (company), a Swiss athletic shoe and sportswear company
On Kawara, Japanese artist
Nauru Airlines (IATA airline designator ON)
Old Norse, a North Germanic language commonly referenced in etymology
Ontology, a branch of philosophy that deals with the concept of being
On'yomi, reading of Japanese kanji characters
Order of the Nation, a Jamaican honour
Overground Network, a railway scheme in South London
ON convoys, a series of WWII trade convoys
Orka náttúrunnar (ON Power), Icelandic geothermal power company
{{lang|eu-ES|On}}, a Basque-language honorific equivalent to Spanish {{lang|es|Don (honorific)}}
On, a preposition
On, one of the French personal pronouns