| Box Width: | 30em |
| Northern Line Kuzey Hattı | |
| Type: | Commuter rail |
| Status: | Operating |
| Locale: | İzmir |
| Predecessor: | Çiğli suburban |
| First: | 5 December, 2010 (Alsancak–Çiğli) 30 January, 2011 (Çiğli–Aliağa) |
| Operator: | İZBAN |
| Ridership: | 107,653 (daily 2011) |
| Start: | Alsancak |
| Stops: | 18 |
| End: | Aliağa |
| Distance: | 561NaN1 |
| Journeytime: | 2 hours end to end, 1.5 hour average single trip |
| Frequency: | Every 10 minutes (Alsancak-Menemen) Every 20 minutes (Menemen-Aliağa) Every 8 minutes(Halkapınar-Çiğli, peak hours) |
| Trainnumber: | many |
| Class: | classless |
| Access: | Yes |
| Seating: | Bunch-of four and sideways rapid transit style seating |
| Baggage: | Baggage racks in the train |
| Stock: | E22000 |
| Load Gauge: | UIC (structural gauge is TCDD gross gauge) |
| El: | 25 kV AC |
| Speed: | 140km/h |
| Owners: | İZBAN |
| Depot: | Çiğli |
| Color: | 10A19A |
The Northern Line is a commuter rail line operated by IZBAN using tracks owned by the Turkish State Railways. The line runs from north from Alsancak Terminal in Izmir to the town of Aliağa.
Train service on the line was inaugurated on 5 December 2010 between Alsancak and Çiğli. Service was extended further north to Aliağa on 30 January 2011.
Between Cumaovası and Menemen, a total of 86 trains operate in each direction daily (42 continuing on to Aliağa, 42 continuing to Tepeköy). The first train leaves Alsancak at 5:57, and the last train leaves at 1:00.
Passengers may transfer to the İzmir Metro at Halkapınar, and connections are available to the State Railway's regional and main line trains at Çiğli and Menemen.