- Termini
- Kennington, Battersea Power Station, Morden Edgware, High Barnet, Mill Hill East
- Colour on map
- Black
- Website
- tfl .gov .uk /tube /route /northern /
- Type
- Rapid transit
- System
- London Underground
- Depot s
- Golders Green Morden Stabling Sidings : Highgate Edgware High Barnet
- Rolling stock
- 1995 Stock
- Ridership
- 339.7 million passenger journeys (2019)
- Opened
- 18 December 1890 ; 135 years ago ( 1890-12-18 )
- Last extension
- 20 September 2021 ; 4 years ago ( 2021-09-20 )
- Line length
- 58 km (36 mi)
- Character
- Deep-tube