The Narita Line (Japanese: 成田線, romanized: Narita-sen) is the name for a combination of three railway lines located in Chiba Prefecture, Japan, operated by the East Japan Railway Company (JR East).

All services on the Abiko branch line are local trains stopping at all stations.

[citation needed] The Sakura to Narita section was electrified (at 1,500 V DC overhead) in 1968.

[citation needed] The Sakura to Narita section was double-tracked in 1986, and the Airport branch opened in 1991 as an electrified, CTC-signalled line.

[citation needed] In the early hours of 10 March 2011, a day before 2011 Tōhoku earthquake and tsunami occurred, a freight train carrying ethylene oxide derailed and overturned on the Narita Line near Namegawa Station.