- Owner
- Indian Railways
- Area served
- Kolkata metropolitan area
- Locale
- Kolkata , West Bengal , India
- Transit type
- Rapid transit
- Number of lines
- Operational: 5 Proposed/Approved: 1
- Line number
- Blue Line Green Line Purple Line Yellow Line Pink Line Orange Line
- Number of stations
- Operational : 58 Under construction: 22 Proposed/Approved : 44 Total : 124
- Daily ridership
- 597,260 (2024–25)
- Annual ridership
- 218,100,000 (218.1 million, 2024–25)
- Website
- mtp.indianrailways.gov.in kmrc.in
- Began operation
- 24 October 1984 ; 41 years ago ( 1984-10-24 ) as Metropolitan Transit Project 29 December 2010 ; 15 years ago ( 2010-12-29 ) as a railway zone under Indian Railways